What intermittent fasting is, how it works in the body, its potential benefits, and the risks of applying it incorrectly.

Intermittent fasting has become one of the most popular nutritional strategies in recent years, especially among individuals looking to lose weight. While it can offer metabolic and health benefits, it is not without risks if practiced without proper knowledge or supervision.

Adriana Martín Peral – Neolife Nutrition Unit

What Is Intermittent Fasting?

Intermittent fasting is not a diet per se, but rather an eating pattern that alternates periods of food intake with periods of fasting. It focuses less on what you eat and more on when you eat. Unlike traditional diets, it is not based on restricting specific foods, but on structuring the timing of meals.

Main Types of Intermittent Fasting

16:8 Fasting

This involves fasting for 16 hours and concentrating food intake within an 8-hour window. It is the most popular protocol due to its ease of integration into daily life.

14:10 Fasting

A more flexible version, recommended for beginners or individuals with higher energy demands.

5:2 Method

Five days of normal eating and two non-consecutive days with significantly reduced caloric intake.

Alternate-Day Fasting

Alternates days of normal eating with days of complete or partial fasting. It is more demanding and less sustainable for many people.

How Does Intermittent Fasting Work in the Body?

During the first hours of fasting, the body uses stored glucose in the form of glycogen. Once these reserves are depleted, it begins to rely on body fat as a source of energy.

This process is accompanied by:

• A decrease in insulin levels
• An increase in glucagon
• Activation of cellular repair mechanisms

These changes explain many of the effects associated with intermittent fasting.

Positive Effects of Intermittent Fasting

When properly implemented and adapted to the individual, intermittent fasting may offer several benefits:

1. Improved Insulin Sensitivity

Lower insulin levels promote better blood glucose control, which may be beneficial for individuals with insulin resistance or risk of type 2 diabetes.

2. Fat Loss

By promoting fat utilization as fuel, it may contribute to weight loss, especially when combined with a balanced diet.

3. Metabolic Health

Some studies associate intermittent fasting with improvements in markers such as cholesterol, triglycerides, and blood pressure.

4. Possible Activation of Autophagy

Fasting activates cellular recycling processes known as autophagy, which are linked to cellular health and longevity, although their impact in humans is still under investigation.

Negative Effects if Done Incorrectly

Intermittent fasting is not suitable for everyone, and improper implementation may lead to adverse effects:

1. Nutritional Deficiencies

Reducing eating windows without proper planning may result in insufficient intake of protein, vitamins, and minerals.

2. Digestive Issues and Fatigue

Skipping meals without prior adaptation can cause dizziness, weakness, constipation, headaches, or gastrointestinal discomfort.

3. Unhealthy Relationship with Food

In some individuals, it may promote disordered eating behaviors, binge eating, or a rigid relationship with food.

4. Not Recommended in Certain Cases

It is not advisable for:

• Pregnancy and breastfeeding
• Individuals with eating disorders
• Individuals with eating disorders
• People with certain medical conditions without professional supervision

Common Mistakes When Practicing Intermittent Fasting

• Overeating during the eating window
• Prioritizing ultra-processed foods
• Not meeting protein requirements
• Forcing excessively long fasting periods
• Ignoring the body’s signals

Recommendations for Safe Intermittent Fasting

• Start gradually (14:10 before 16:8)
• Prioritize fresh, nutrient-dense foods
• Maintain proper hydration
• Adapt fasting to lifestyle and activity level
• Consult a nutrition professional

Conclusion

Intermittent fasting can be a useful tool within a healthy eating approach, but it is not a universal solution. Its success depends on the individual, the context, and proper nutritional planning. When practiced with knowledge and supervision, it may provide benefits; when applied incorrectly, it can lead to more harm than good.

BIBLIOGRAPHY

(1) Mattson, M. P., Longo, V. D., & Harvie, M. (2017). Impact of intermittent fasting on health and disease processes. Ageing Research Reviews, 39, 46–58.

(2) Anton, S. D., et al. (2018). Flipping the metabolic switch: understanding and applying the health benefits of fasting. Obesity, 26(2), 254–268.

(3) Patterson, R. E., & Sears, D. D. (2017). Metabolic effects of intermittent fasting. Annual Review of Nutrition, 37, 371–393.

(4) Organización Mundial de la Salud (OMS). Healthy diet factsheet.

La entrada Ayuno intermitente: qué es, beneficios y riesgos de una práctica cada vez más popular se publicó primero en Neolife.

Not everything is about the glycemic index, and you don’t need to “eat unlimited protein.”

If you want to lose body fat, you have probably heard that you should avoid foods with a high glycemic index and significantly increase your protein intake. But what truly matters? Does the glycemic index influence weight loss as much as we think? And how much protein do you actually need? Below, we clarify both concepts based on scientific evidence and practical application.

Adriana Martín Peral – Neolife Nutrition Unit

What Is the Glycemic Index?

The glycemic index (GI) measures how quickly a carbohydrate-containing food raises blood glucose levels compared with pure glucose.

• High GI → rapid rise in blood glucose
• Low GI → slower rise

However, there is a limitation: the glycemic index is measured under isolated conditions, with the food consumed alone and in standardized quantities. In real life, we eat combinations of foods. For this reason, a more practical concept is glycemic load, which takes into account both the quality and the quantity of carbohydrates.

Does the Glycemic Index Matter for Weight Loss?

Evidence shows that:

• Low-GI diets may improve glycemic control.
• They can be particularly beneficial in individuals with insulin resistance.
• However, when calories and protein intake are controlled, GI alone does not determine fat loss.

The factors that most strongly influence weight loss are:

• Sustained caloric deficit
• Adequate protein intake
• Long-term adherence

A high-GI food does not “cause weight gain” by itself. The overall dietary context is what truly makes the difference.

Protein: The Key Player in Fat Loss

If there is one macronutrient that becomes especially important when aiming to lose fat without losing muscle mass, it is protein. Why?

• It increases satiety.
• It reduces the loss of muscle mass during a caloric deficit.
• It has a higher thermic effect (the body expends more energy digesting it).

This leads to an important question:

How Much Protein Is Actually Needed for Weight Loss?

The standard recommendation for the general population is 0.8 g/kg/day.

However, for fat loss and preservation of muscle mass, current evidence suggests an intake of 1.6–2.2 g/kg of body weight per day. That said, before increasing protein intake, it is important to ensure that there is no medical condition requiring a different nutritional approach. Protein intake should always be individualized and supervised by a healthcare professional.

Practical example:

A person weighing 70 kg who wants to lose fat should consume between 112 and 154 g of protein per day. This does not mean “eating unlimited protein.” Beyond this range, the benefits do not increase significantly.

What You Should Really Focus On

Instead of becoming overly concerned with the glycemic index:

• Ensure sufficient protein intake at each meal.
• Combine carbohydrates with fiber, fats, and protein.
• Prioritize minimally processed foods.
• Evaluate your long-term adherence rather than focusing exclusively on GI.

Improving your daily protein distribution will have a much greater impact on body composition than focusing solely on the glycemic index.

Conclusion

The glycemic index can be a useful tool in certain contexts, particularly in individuals with metabolic disturbances, but it is not the decisive factor when it comes to fat loss. What truly makes a difference is maintaining a sustainable caloric deficit, ensuring adequate protein intake, and building a dietary pattern that can be maintained over time.

Within this framework, protein plays a key role because it helps preserve muscle mass, improves satiety, and facilitates adherence to the nutritional plan. However, more is not always better, and recommendations should be adjusted according to each individual’s characteristics and health status.

Ultimately, losing weight does not depend on demonizing foods based on their glycemic index or consuming unlimited protein, but rather on applying strategy, scientific evidence, and long-term consistency.

BIBLIOGRAPHY

(1) Thomas, D., Erdman, K., & Burke, L. (2016). Position of the Academy of Nutrition and Dietetics: Nutrition and Athletic Performance.

(2) Morton, R. W., et al. (2018). Protein intake and muscle mass: A meta-analysis.

(3) Wycherley, T. P., et al. (2012). Effects of energy-restricted high-protein diets on body composition.

(4) Livesey, G., et al. (2008). Glycemic index and body weight: systematic review and meta-analysis.

La entrada Glycemic Index and Protein: What Really Matters If You Want to Lose Weight se publicó primero en Neolife.

Ultra-processed foods are not designed merely to nourish us: they are carefully engineered to make us want to keep eating. It is no coincidence that opening a bag of potato chips or a packet of cookies almost always ends with “just a little more,” until, before we realize it, the package is empty.

These products (snacks, sweets, fast food…) may seem harmless, but behind their intense flavor, perfect texture, and irresistible aroma lie hours of testing, formulas, and fine-tuning aimed at stimulating our senses and activating the brain’s reward system. What exactly do these foods contain that makes them so hard to stop eating? Why can a single bite turn into a chain of cravings? The answer lies in their design: a precise combination of ingredients, textures, and sensory stimuli that subtly encourages us to keep eating.

Adriana Martín Peral – Neolife Nutrition Unit

What Are Ultra-Processed Foods?

Ultra-processed foods are products that undergo multiple industrial transformations and contain a long list of ingredients you would not normally find in a home kitchen. Beyond basic components such as wheat, corn, or milk, they often include added sugars, low-quality fats, flavor enhancers, additives, and texturizers, all designed to improve taste, appearance, and shelf life. The goal of these processes is not only to extend the product’s durability but also to create a perfect texture, an intense flavor, and a pleasurable eating experience, all while keeping production costs low. This is why, although they may appear to be simple snacks or ready-to-eat meals, each bite involves food engineering designed to capture our attention and keep us eating for longer.

How Ultra-Processed Foods Create Cravings

It is no coincidence that it is so difficult to stop after opening a bag of chips or a packet of cookies. Ultra-processed foods are designed to activate the brain’s reward system, releasing dopamine and making each bite more appealing than the last. This is achieved through what experts call the “irresistible triad”: sugar, fat, and salt. The precise combination of these three elements is carefully calibrated to maximize pleasure without becoming overwhelming, stimulating the release of dopamine, the neurotransmitter associated with pleasure and motivation.

Added to this is the concept of the “bliss point,” which describes the exact level of sugar, fat, or salt that produces the greatest satisfaction. Companies conduct extensive sensory testing to find the perfect proportion, ensuring that each bite is highly pleasurable and difficult to abandon.

Moreover, the texture and aroma of these foods are engineered to reinforce pleasure. The perfect crunch of potato chips, the melt-in-your-mouth smoothness of chocolate, or the softness of certain industrial breads send signals of freshness and flavor to the brain, increasing the compulsion to eat more. Even the low satiety of many ultra-processed foods (due to their low fiber or protein content) contributes to the brain continuing to ask for “just a little more,” even when the stomach is already full.

Ultra-processed foods do not rely solely on sugar, fat, and salt. Aromas and flavor enhancers also play a role in making each bite more irresistible. Ingredients such as monosodium glutamate (MSG), artificial flavorings, and industrial aromas intensify taste so that the brain perceives the food as more flavorful than it truly is. These additives provide no nutritional value but deceive our senses, generating a sense of pleasure that encourages continued consumption. It is a small chemical and sensory trick that, combined with other factors, makes stopping extremely difficult.

Another key factor is that many ultra-processed foods generate low satiety, meaning we do not feel sufficiently full despite having consumed many calories. This is because they tend to be calorie-dense but poor in fiber and protein—nutrients that help regulate appetite. As a result, the brain continues to send signals of hunger or craving even after sufficient energy intake. This combination of low satiety and high sensory reward turns these foods into an almost automatic cycle of eating more, again and again.

Marketing and Environment: Induced Cravings

It is not only ingredients and sensory engineering that make ultra-processed foods hard to resist; marketing and environment also play a key role in generating cravings and impulsive purchases. Bright packaging colors, eye-catching designs, and noisy wrappers are carefully designed to capture attention and associate the product with fun or pleasure.

In addition, many of these products are sold in small portions that seem harmless, leading us to underestimate how much we are consuming. This psychological design makes opening a package far more tempting and easy to eat “without guilt,” even though you may end up consuming more than planned.

Targeted advertising further reinforces these habits—not only in children, but also in adults. Commercials, social media, and promotions associate these foods with happy moments, rewards, or indulgence, creating emotional connections that go beyond simple hunger.

Finally, strategic placement in stores and supermarkets increases impulsive consumption. Positioning snacks at eye level, near checkout counters, or in main aisles makes them almost impossible to ignore. Even if you go shopping for a single ingredient to cook, constant exposure to these products activates the desire to buy and consume them immediately.

Together, these marketing and environmental factors do not merely sell the product—they manipulate our cravings, reinforcing the habits that ultra-processed foods have already begun to create through taste and texture.

Practical Example: Why Potato Chips Crunch the Way They Do

The crunch of potato chips does not happen by chance; it is the result of careful sensory engineering. Brands specifically adjust sound and texture so that each bite is highly pleasurable and encourages continued eating.

1. The crunching sound stimulates the brain

The characteristic “crack” activates brain areas associated with pleasure and the perception of freshness. Noisy foods are perceived as fresher, newer, and more desirable, and companies calibrate the hardness and shape of the chips to make the sound as “perfect” as possible. Studies have shown that when the crunch is amplified, people rate chips as tastier, even if they are exactly the same product.

2. Extremely low moisture content

Potato chips are fried until they contain only about 1–2% moisture. This extreme dryness makes their structure fragile, breaking into small fractures when bitten and producing a highly satisfying crunch. With more moisture, they would become chewy or soggy and lose this effect.

3. Porous structure and trapped air

During frying, the water inside the potato rapidly turns into steam, creating small internal bubbles. This microcavity-filled structure causes the chip to break into many particles at once when bitten, producing a more complex and pleasant crunch.

4. Fat and salt coating: the winning combination

The fat coating lubricates the mouth and enhances flavor, while salt intensifies taste and increases salivation. Together, fat and salt make the crunch more pronounced and the eating experience even more rewarding.

5. Crunch equals instant reward

The crunch reaches the ears milliseconds before the mouth perceives it, and the brain interprets it as “delicious.” This signal triggers a small dopamine release, reinforcing the habit of continuing to eat. That is why, even when we are full, sound and texture can push us to eat more than we need.

Conclusion

Ultra-processed foods are not simply foods: they are carefully designed products created to generate cravings. Their combination of flavor, texture, aroma, marketing, and low satiety activates brain reward circuits, creates automatic habits, and makes it difficult to stop—even when the body has already received enough energy. Understanding how these mechanisms work allows us to make more conscious choices and prioritize real foods most of the time, reducing the influence of strategies designed to keep us eating more.

BIBLIOGRAPHY

(1) Monteiro, C. A., Cannon, G., Lawrence, M., et al. (2019). Ultra-processed foods, diet quality, and health using the NOVA classification system. *FAO and Pan American Health Organizat

(2) SINC. Vinculan el consumo de ultraprocesados con síntomas depresivos y cambios en circuitos cerebrales. Agencia SINC. Agencia Sinc

(3) Sánchez Perona, J. “Los alimentos ultraprocesados se diseñan para ser muy apetitosos y fáciles de consumir”. Delegaciones CSIC. delegacion.andalucia.csic.es

(4) National Geographic. Alimentos ultraprocesados y su relación con la salud mental. National Geographic España

(5) El País. ¿Por qué los alimentos procesados son tan adictivos? Esta es la razón científica. Diario El País

(6) National Geographic. ¿Qué es más adictivo, la comida ultraprocesada o el tabaco? National Geographic España

(7) Lavanguardia. Entrevista con Claire Wilcox: “Alimentos con alto contenido en azúcar y ultraprocesados afectan al cerebro …”. La Vanguardia

(8) Business Insider (español). Ultraprocesados tan adictivos como el tabaco, según un nuevo estudio científico. Business Insider España

(9) El Economista. Por qué el cerebro es “adicto” a la comida ultraprocesada (y qué funciones puede alterar). El Economista

(10) El Tiempo. Los alimentos ultraprocesados serían dañinos para el cerebro, según estudio.

La entrada Why You Can’t Eat Just One: The Science Behind Ultra-Processed Foods and Cravings se publicó primero en Neolife.

Understand the biological and emotional keys behind your food choices and improve your relationship with food

We often believe that eating until we feel “full” is synonymous with having eaten well. However, true nourishment depends not only on how much we eat, but also on how we feel afterward. In this article, we explain the differences between satiety and satisfaction—two concepts that, although similar, have very different impacts on our health and well-being.

Arantxa Jiménez – Neolife Nutrition Unit

What Is Satiety?

Satiety is a physiological response of the body that signals that the stomach is full and that, at least temporarily, no more food is needed. It is mainly regulated by hormones such as leptin, insulin, and cholecystokinin, which send signals to the brain to reduce appetite after food intake.

In simple terms, being satiated means no longer feeling physical hunger. This state can be achieved by eating large quantities of food, even if those foods are not particularly nutritious or enjoyable. For example, a meal high in refined carbohydrates may fill you up quickly, but it does not necessarily nourish you or provide satisfaction.

What Is Dietary Satisfaction?

Satisfaction, on the other hand, is a more subjective and emotional process. It involves feeling that what you ate was enjoyable, sufficient, and aligned with your real needs and desires. It relates to how you experience food—its flavor, texture, temperature, and even the environment in which you eat.

Feeling satisfied means that food has fulfilled a purpose beyond simply relieving hunger: it has been a pleasant and nourishing experience. This type of eating is often associated with a healthier relationship with food and can help prevent binge eating or subsequent emotional eating.

Key Differences Between Satiety and Satisfaction

Why Does This Difference Matter?

Understanding this distinction is essential for achieving intuitive and mindful eating. Eating solely to reach satiety can lead to automatic or restrictive eating patterns, while also seeking satisfaction allows for more balanced, sustainable, and pleasurable food choices.

Moreover, when meals are satisfying, individuals are more likely to respect internal hunger and fullness cues, which can help prevent emotional eating, constant snacking, or late-night binge episodes.

Tips for Achieving Both Satiety and Satisfaction When Eating

1. Include all three macronutrients (carbohydrates, healthy fats, and protein) in your meals to promote sustained satiety.
2. Listen to your body and learn to distinguish between true hunger and emotional or habitual eating.
3. Make your meals a sensory experience: pay attention to flavor, aroma, texture, and your surroundings.
4. Eat without guilt: food also serves emotional and social purposes.
5. Plan meals you truly enjoy—eating well does not mean giving up pleasure.

BIBLIOGRAPHY

(1) Tribole, E., & Resch, E. (2020). Intuitive Eating: A Revolutionary Anti-Diet Approach. St. Martin’s Essentials.

(2) Montse Bradford. (2015). La alimentación emocional. Editorial Urano.

(3) Damasio, A. (2005). En busca de Spinoza: Neurobiología de la emoción y los sentimientos. Crítica.

(4) Rolls, B. J., & Hetherington, M. (1990). Sensory-specific satiety: Theoretical frameworks and central mechanisms. Appetite.

(5) Kristeller, J. L., & Wolever, R. Q. (2011). Mindfulness-Based Eating Awareness Training (MB-EAT): A clinical manual.

La entrada Satiety vs. Satisfaction: Why Feeling Full Is Not the Same as Feeling Well Nourished se publicó primero en Neolife.

How to prepare for the colder months from your plate: nutritional keys to strengthening your defenses.

Autumn marks a significant transition: days become shorter, temperatures drop, and with this change, cases of colds, flu, and other seasonal infections increase. This season represents an ideal window of opportunity to strengthen the immune system naturally, using a powerful tool: nutrition.

Arantxa Jiménez – Neolife Nutrition Unit

Seasonal Foods and Functional Foods

In this article, we explore how a diet focused on seasonal and functional foods can be key to preparing our defenses for the challenges of winter. In addition to providing flavor and variety, the foods autumn offers are packed with vitamins, minerals, antioxidants, and bioactive compounds that support immune function and help maintain the body’s balance.

Why Is It Important to Strengthen the Immune System in Autumn?

During this season, sun exposure decreases, which can lower vitamin D levels—a key vitamin for immune health. The gut microbiota may also change due to dietary variations and reduced physical activity. At the same time, respiratory viruses and illnesses such as influenza become more prevalent, and the body requires greater immune energy to adapt to temperature changes.

A weakened immune system can lead to increased susceptibility to infections, persistent fatigue, digestive irregularities, and even a lower mood. For this reason, strengthening the immune system through diet is a fundamental, natural, and effective strategy.

Seasonal Nutrition: What Autumn Gives Us to Protect Ourselves

Seasonal eating involves consuming foods at their peak harvest time throughout the year. In autumn, nature provides products rich in antioxidants, fiber, and micronutrients that support immune health.

Notable foods include:

• Sweet potato: rich in beta-carotenes (provitamin A), essential for maintaining the integrity of the respiratory mucosa.
• Pumpkin: a source of vitamins C and E, as well as zinc, with antioxidant and immune-protective effects.
• Mushrooms: contain beta-glucans, compounds that activate the innate immune response.
• Apple: provides fiber and polyphenols that support gut microbiota, a key factor in immune regulation.
• Grapes and berries: high in resveratrol and anthocyanins, which combat oxidative stress.
• Chestnuts and walnuts: sources of vitamin E and selenium, with anti-inflammatory and immunomodulatory effects.

Including these foods in soups, purées, warm salads, or oven-baked dishes allows for functional nourishment tailored to the immune needs of this season.

Functional Foods That Support Immunity

A functional food not only nourishes but also provides specific health benefits, such as strengthening defenses or improving intestinal balance.

• Garlic and onion: rich in sulfur compounds with antimicrobial and immune-modulating effects.
• Kefir and natural yogurt: sources of probiotics that support gut microbiota health.
• Turmeric and ginger: powerful natural anti-inflammatories that help regulate an excessive or imbalanced immune response.
• Citrus fruits: high in vitamin C, antioxidants that support white blood cell production and help reduce the duration of colds.
• Green tea: contains catechins, antioxidant compounds with antiviral and immune-stimulating properties.

Regularly incorporating these foods enhances our immune resilience against infections.

BIBLIOGRAPHY

(1) Calder, P. C. (2020). Nutrition, immunity and COVID-19. BMJ Nutrition, Prevention & Health, 3(1), 74–92. https://doi.org/10.1136/bmjnph-2020-000085

(2) Gombart, A. F., Pierre, A., & Maggini, S. (2020). A Review of Micronutrients and the Immune System–Working in Harmony to Reduce the Risk of Infection. Nutrients, 12(1), 236. https://doi.org/10.3390/nu12010236

(3) Hosseini, B., et al. (2019). The role of micronutrients in the immune system: A review. Clinical Nutrition ESPEN, 33, 1–13. https://doi.org/10.1016/j.clnesp.2019.05.006

(4) Valdés, L., et al. (2018). Role of the gut microbiota in nutrition and health. BMJ, 361, k2179. https://doi.org/10.1136/bmj.k2179

(5) FAO. (2021). Seasonal Food and Nutrition. Food and Agriculture Organization of the United Nations. https://www.fao.org

La entrada Strengthening the Immune System in Autumn Through Seasonal and Functional Nutrition se publicó primero en Neolife.

In nutrition, we often talk about calories, proteins, or fats—but we tend to forget that the body also has its own internal clock. This “biological clock,” known as the circadian rhythm, determines the times of day when metabolism, hormones, and digestion work best.

Each meal we eat can either **synchronize—or disrupt—**that clock. Eating at irregular hours, skipping meals, or having dinner too late can affect weight, energy, sleep quality, and even mood.

Meritxell Massons – Neolife Nutrition Unit

Why Does the Body Have Metabolic Schedules?

Our body doesn’t process food the same way in the morning as it does at night. Insulin sensitivity, digestive enzyme production, and energy expenditure vary throughout the day.

Research has shown that:

• Eating most of the daily calories before 3:00 p.m. supports better weight control.
• Late dinners (after 10:00 p.m.) are linked to higher fat accumulation and poorer sleep.
• Keeping regular meal times helps maintain circadian rhythm balance and appetite regulation.

In other words, our body expects food during the day and rest at night. Disrupting this pattern creates a “metabolic jet lag” that can impact long-term health.

How Does Meal Timing Affect Energy and Metabolism?

• Early breakfast, active metabolism.
• Starting the day with a balanced breakfast — rich in protein, fiber, and complex carbohydrates — activates thermogenesis (energy production) and improves focus.
• Skipping breakfast or delaying it too long can disrupt blood glucose balance and increase appetite later in the day.
• Light dinners, deep rest.
• At night, metabolism slows down and digestion becomes less efficient. That’s why a heavy or late dinner can lead to indigestion, poor sleep quality, and fat accumulation.
• Choosing lighter dinners and eating 2–3 hours before bedtime is a simple and effective strategy.

Time-Restricted Eating: Trend or Real Evidence?

The so-called time-restricted eating (TRE) approach proposes consuming all meals within a daily window of 8–12 hours.

For example: having breakfast at 8:00 a.m. and finishing dinner before 8:00 p.m.

What does the science say?

• Studies published in Cell Metabolism (Hatori et al., 2012) and Nutrients (Manoogian & Panda, 2017) show that this eating pattern can improve insulin sensitivity, appetite control, and cardiovascular health.
• However, this doesn’t mean fasting without control — meal quality and regularity are just as important.
  Individuals with high energy demands or specific medical conditions should consult a professional before adopting this method.
• Individuals with high energy demands or specific medical conditions should consult a professional before adopting this method.

Conclusion

Meal synchronization is a powerful tool to improve metabolic health without extreme diets. It’s not about eating less — it’s about eating at the right time.

Listen to your body, organize your schedule, prioritize daytime meals, and let your digestive system rest at night.

Your internal clock will thank you with more energy, better digestion, and greater well-being.

BIBLIOGRAPHY

(1) Manoogian ENC, Panda S. Circadian rhythms, time-restricted feeding, and human metabolic health. Trends Endocrinol Metab. 2016;27(4):225-237.

(2) Garaulet M, Gómez-Abellán Timing of food intake and obesity: a novel association. Int J Obes (Lond). 2014;38:1325-1331.

(3) Hatori M, Vollmer C et al. Time-restricted feeding without reducing caloric intake prevents metabolic diseases in mice fed a high-fat diet. Cell Metab. 2012;15(6):848-

(4) Jakubowicz D et al. High caloric intake at breakfast vs dinner differentially influences weight loss of overweight and obese women. Obesity (Silver Spring). 2013;21(12):2504-2512.

La entrada Meal Timing: The Invisible Clock That Regulates Your Health se publicó primero en Neolife.

Have you ever noticed that after a bad day you crave something sweet or salty almost uncontrollably? Or that you eat without really being hungry, just to feel better?

These situations, more common than we think, may be due to emotional hunger—a mechanism the body uses to cope with certain emotions. Distinguishing between physiological hunger and emotional hunger is key to improving your relationship with food, maintaining optimal health, and preventing compulsive eating behaviors.

Meritxell Massons – Neolife Nutrition Unit

What is physiological hunger?

Physiological hunger is the natural sensation that arises in the body when it needs nutrients to carry out vital functions.

Our body requires energy and nutrients to function properly, both for internal processes (metabolism, digestion, cell regeneration) and for our daily activities.

Identifying physiological hunger

Recognizing when we truly need to eat helps us nourish our body consciously. Here are some clues to identify it:

• It is not a craving for a specific food; it can be satisfied with different options.
• The sensation appears gradually and increases over time.
• It can wait a few minutes or longer before being satisfied.
• Eating does not lead to guilt or regret.
• It disappears once we feel full.

What is emotional hunger?

Emotional hunger arises as a response to emotional states, especially negative ones.

When we are stressed, sad, anxious, or lonely, our body seeks a quick way to relieve this discomfort. Food—especially foods rich in sugar or fat—triggers a hormonal release that produces a momentary sense of well-being.

This type of hunger is not driven by a physical need but by an emotional one. And while it may make us feel better in the moment, over time it can create a cycle of dissatisfaction, guilt, and repetition.

Identifying emotional hunger

Some signs that indicate we are not eating out of real hunger include:

• It appears suddenly and intensely.
• It focuses on very specific foods (cravings).
• The need to eat feels immediate.
• After eating, negative emotions such as guilt or frustration appear.
• It does not go away with satiety, and eating can continue without stopping.

How to manage emotional hunger in a healthy way

Knowing how to differentiate between the types of hunger is not always enough: we also need tools to manage those emotions without turning to food as the only escape.

Here are some practical tips:

• Hydration: many times we confuse thirst with hunger. Stay well hydrated throughout the day.
• Structured eating: having regular schedules and balanced meals helps maintain satiety and prevent binges.
• Emotional awareness: learn to identify what emotion you are feeling and how it shows up in your body.
• Therapy and emotional support: psychological guidance is key to addressing the underlying causes.
• Relaxation techniques: meditation, mindful breathing, yoga, or simply going for a walk can be powerful allies.
• Healthy alternatives: when you feel the urge to eat due to anxiety, try activities such as reading, calling a loved one, taking a walk, writing, or practicing a hobby.

Remember: there are no good or bad foods

It is important not to fall into the trap of judging yourself for what you eat. No food is “good” or “bad” by itself. What matters is the overall balance of your lifestyle.

Incorporate habits that help you live with greater well-being:

• A conscious, varied diet.
• Regular physical activity.
• Quality rest.
• Emotional management.

Conclusion: listening to your body is a form of self-care

Distinguishing between emotional and physiological hunger is not easy at first, but it is a crucial step toward mindful eating and a healthy relationship with food.

Learning to identify what your body needs and how it responds emotionally will allow you to make freer, healthier decisions. If you feel you cannot do it on your own, remember that seeking help from a professional (nutritionist and/or psychologist) is a valuable form of self-care.

BIBLIOGRAPHY

(1) Beaulieu, K., & Blundell, J. E. (2021). The psychobiology of hunger – a scientific perspective. Topoi.

(2) Gregg, S. Q. (2015, septiembre 22). Deciphering between emotional, physical hunger. Medical Xpress.

(3) Pietrzyk, A. (2022, 17 de noviembre). The scientific reason why you always eat so much—and how to rein it in. Real Simple.

(4) Reents, J., Seidel, A.-K., Wiesner, C. D., & Pedersen, A. (2020). The effect of hunger and satiety on mood‑related food craving. Frontiers in Psychology, 11, 568908.

La entrada Emotional hunger or physiological hunger? se publicó primero en Neolife.

Small eating habits with real impact (without going crazy).

Nutritional biohacking is the practice of optimizing your body and mind with small, strategic changes. But you don’t need implants or exotic supplements. Sometimes, the basics done right are enough.

Adriana Martín – Neolife Nutrition Unit

Nutritional Biohacking

Feeling more energetic, sleeping better, thinking more clearly… all that without following a strict diet or spending a fortune on exotic supplements. Welcome to the world of nutritional biohacking, a way to optimize your body through smart micro-habits you can start applying today.

The goal isn’t to follow an impossible routine, but rather to understand the key principles that regulate how you feel, eat, and function—and act on them strategically. Here are some simple yet powerful changes, backed by science and by the experience of those already practicing them.

Here’s the minimum effective dose you can do to feel better without complicating your life:

1. Start Eating Later (and Stop Eating Earlier)

Intermittent fasting is not just a trend: studies show that restricting your eating window to 8–10 hours improves insulin sensitivity, reduces inflammation, and supports mental clarity. If you have breakfast at 10 a.m. and dinner before 7 p.m., you’re in the game without extreme effort.

The best part? You don’t need to count calories or follow a specific diet—just give your digestive system a real break.

2. Micro-Doses of Caffeine, Not Energy Bombs

Many of us rely heavily on coffee to kickstart the day, but the ideal approach is small doses spread out: one cup after waking (waiting 60–90 minutes), another at midday, and none after 3 p.m. This way, you avoid the highs and crashes that affect your mood and sleep.

And if you can swap one of those cups for green tea or yerba mate, you’ll get extra benefits such as L-theanine, which smooths caffeine’s effect and boosts focus.

3. Eat Smart Fats for Your Brain

Sixty percent of your brain is made of fat, and what you eat directly affects its performance. Avocado, nuts, eggs, salmon, olive oil, and chia seeds are key allies. Adding these healthy fats not only keeps you fuller for longer but also enhances focus, memory, and mood.

A handful of nuts a day can literally make a difference.

4. Foods That Calm the Mind (Yes, Including Chocolate)

Low levels of magnesium, tryptophan, and zinc have been linked to anxiety and fatigue. You can support your mental well-being with foods like dark chocolate (at least 85%), bananas, spinach, lentils, oats, and plain yogurt.

You don’t need expensive supplements—just make sure your plate has a variety of colors and natural textures. Your nervous system will thank you.

5. Morning Sun

Minimum effective dose: 5–10 minutes without sunglasses.

• It regulates your biological clock (circadian rhythm), improves mood, and supports sleep.
• If it’s winter or you’re indoors, consider a natural light lamp.

Conclusions

You don’t need to make huge sacrifices to start feeling better. Nutritional biohacking is about doing the minimum necessary—but doing it with intention. Small daily changes, applied consistently, can generate a big impact over time.

Start today with just one. Pick the one that resonates most with you. And remember: your body is listening to everything you eat.

BIBLIOGRAPHY

(1) Panda, S., et al. (2016). Time-restricted feeding improves metabolic health. Cell Metabolism.

(2) NIH – Intermittent Fasting in Humans

(3) Haskell, C. F., et al. (2008). The combined effects of L-theanine and caffeine on cognitive performance and mood. Nutritional Neuroscience.

(4) Smith, A. (2002). Effects of caffeine on human behavior. Food and Chemical Toxicology.

(5) Dyall, S. C. (2015). Long-chain omega-3 fatty acids and the brain: a review of studies in depression. CNS & Neurological Disorders.

(6) Harvard Health Publishing: “The truth about fats: the good, the bad, and the in-between”

(7) Barbagallo, M., et al. (2010). Magnesium and aging. Current Pharmaceutical Design.

(8) Sarris, J., et al. (2015). Nutritional medicine as mainstream in psychiatry. The Lancet Psychiatry.

(9) Nehlig, A. (2013). The neuroprotective effects of cocoa flavanols. British Journal of Clinical Pharmacology.

(10) Asprey, D. (2014). The Bulletproof Diet. (referencia popular, no científica, pero influyente en la cultura del biohacking).

(11) Rhonda Patrick, PhD – Bioquímica especializada en nutrición funcional y salud cerebral.

(12) ZOE Health App / Tim Spector – Estudios sobre microbioma y alimentación personalizada.

La entrada Nutritional Biohacking: The Minimum You Can Do to Feel Better se publicó primero en Neolife.

When we talk about improving our diet, two concepts often come up: eating healthy and eating balanced.

It is very common to discuss both terms during consultations since, although they sound similar, they are not the same. What is the difference? Is it possible to eat healthy without having a balanced diet, or vice versa?

Adriana Martín Peral – Neolife Nutrition Unit

What does eating healthy mean?

Eating healthy means choosing foods that provide real benefits to our body. This includes a variety of essential nutrients such as vitamins, minerals, antioxidants, fiber, and healthy fats. Foods typically considered healthy include: fruits and vegetables, legumes, nuts and seeds, healthy fats, whole grains, and lean proteins.

This type of diet is based on minimally processed, natural, or whole foods. Eating healthy also means reducing the consumption of ultra-processed products, which often contain added sugars, excessive sodium, trans fats, and artificial additives.

But be careful: healthy does not always mean sufficient or balanced.

What does eating balanced mean?

Eating balanced goes beyond the foods you choose: it’s about meeting your body’s nutritional needs in the right amounts and proportions. A balanced diet includes:

• Macronutrients (carbohydrates, proteins, and fats) in proper ratios for your age, activity level, and metabolism.
• Micronutrients (vitamins and minerals) in adequate amounts.
• Variety of foods from all food groups.
• Caloric balance: neither excess nor prolonged deficit without professional supervision.
• Schedules and routines that allow efficient digestion and a healthy metabolism.

Can you eat healthy but not balanced?

Yes, and in fact, it is very common. Example: someone who only eats salads, fruits, and smoothies. Although all of these foods are healthy, they may be consuming too little protein, too few calories, or insufficient healthy fats. This can lead to fatigue, lack of focus, loss of muscle mass, and long-term hormonal problems.

Can you eat balanced without eating healthy?

Yes, as well. For example, a diet based on ultra-processed products may be “balanced” in terms of calories and macronutrients, but poor in nutritional quality. This can cause chronic inflammation, overweight, type 2 diabetes, or other metabolic diseases.

What are the most common mistakes?

1. Overly restricting certain food groups: Many people completely eliminate carbohydrates thinking they are “bad.” However, complex carbohydrates (such as whole grains) are essential as a source of energy. Moreover, evidence shows that low intake of carbohydrates — especially complex ones, which are an excellent source of fiber — compromises gut health in the long term, often causing intestinal issues.
2. Confusing fad diets with health: Keto, intermittent fasting, detox… Not all popular strategies are right for everyone. Some may cause imbalances if not done with professional supervision. For example, intermittent fasting can be a healthy approach, but if it leads to reduced protein intake, muscle mass will decline, making the diet unbalanced.
3. Overvaluing “fit” or “light” products: A low-fat or sugar-free product is not always healthy. Many “light” products are highly processed or contain artificial sweeteners, which are not necessarily better. In such cases, the product may be “balanced” in terms of macronutrients but not truly healthy.

So, what’s the key?

The key is to combine both approaches:

• Real, natural, and varied foods.
• Adequate proportions according to your needs.
• Flexibility to enjoy food without guilt.
• Listening to your body: hunger, satiety, energy.

It’s not about obsessively counting calories or eating “perfectly” all the time. A healthy and balanced diet is one that you can sustain over time, makes you feel good physically and mentally, and is not based on guilt, restriction, or fear of gaining weight.

Practical tips to achieve it

• Always include a source of protein, a complex carbohydrate, and a healthy fat in every meal (following the “Harvard Plate” method).
• Don’t be afraid of natural, calorie-dense foods such as avocado, nuts, or olive oil — they are rich in essential fatty acids, which are vital for your body’s proper functioning.
• Avoid eating only out of anxiety, habit, or boredom. Learn to distinguish real hunger from emotional hunger.
• Plan your meals so you don’t end up improvising with the first thing you find.
• Don’t punish yourself if one day you overeat or choose something outside of “healthy.” What matters is overall balance, not daily perfection.

Conclusion

Eating healthy and eating balanced are not the same, but both are essential for a long, active, and disease-free life. Learning to identify the difference and applying both concepts in practice can help you develop a more conscious and positive relationship with food. It’s not about extreme restrictions, but about nutritional education and informed choices. In the end, the goal is simple: eat to nourish yourself, enjoy life, and live better.

BIBLIOGRAPHY

(1) Harvard T.H. Chan School of Public Health. (2020). Healthy Eating Plate & Healthy Eating Pyramid. Retrieved from: https://www.hsph.harvard.edu/nutritionsource/healthy-eating-plate/

(2) Organización Mundial de la Salud (OMS). (2023). Alimentación saludable. https://www.who.int/es/news-room/fact-sheets/detail/healthy-diet

(3) Willett, W., Rockström, J., Loken, B., et al. (2019). Food in the Anthropocene: the EAT–Lancet Commission on healthy diets from sustainable food systems. The Lancet, 393(10170), 447–492.

(4) Fundación Española de la Nutrición (FEN). (2022). Guías alimentarias saludables. https://www.fen.org.es/

(5) Academy of Nutrition and Dietetics. (2022). Position of the Academy: Total Diet Approach to Healthy Eating. Journal of the Academy of Nutrition and Dietetics, 122(3), 578–592.

La entrada Healthy Eating vs. Balanced Eating: What’s the Difference and Why Does It Matter? se publicó primero en Neolife.

Learn to Decode Nutrition Labels to Make Healthy Choices Without Falling for Marketing Tricks

We often buy foods guided by words like “light” or “natural” without checking what they actually contain. Nutrition labels are there to help you, but they are not always easy to understand. This guide will show you how to interpret key information in a practical way, so you can choose healthier products with confidence and ease.

Arantxa Jiménez – Neolife Nutrition Unit

Introduction

The nutrition label on packaged products is designed to help you make informed choices, yet many consumers either don’t read it or don’t understand it. Studies show that only between 30% and 60% of the population reviews labels before buying, and an even smaller proportion knows how to interpret them correctly.

Why are they so difficult to understand?

• Lack of knowledge and nutrition literacy: Without these, it’s hard to process values such as calories, fats, and sugars.
• Time and format barriers: Dense labels with tiny print or complex tables are impractical for quick shopping.
• Misleading marketing perception: Many products with claims like “healthy,” “natural,” or “fortified” may still contain high levels of sugar or sodium.

What to look for on a nutrition label

1. Serving size and servings per container: Some products contain multiple servings, which changes the calculations.
2. Calories per serving: Useful for managing total daily intake.
3. Nutrients to limit: Added sugars, saturated fats, sodium — important for preventing chronic diseases.
4. Nutrients to encourage: Protein, fiber, vitamins, and minerals.
5. Ingredients list: The first items are the most abundant; if additives and sugars appear before fruits or vegetables, the product is more processed.

Front-of-pack labels: Do they make choices easier?

Front-of-pack (FOP) systems like Nutri-Score, traffic-light labels, or warning symbols provide quick insight into a product’s nutritional profile:

• Nutri-Score, utilizado en España y otros países europeos, califica de A (verde) a E (rojo) según contenido de azúcar, sal, grasas y nutrientes beneficiosos.
• Evidence suggests consumers prefer visual, simple, and color-coded labels.

Real benefits of using labels wisely

• Frequent label readers are 2 to 4 times more likely to meet daily fiber recommendations, eat more vegetables, and reduce sugary drinks.
• In Spain, people following structured diets use labels more often and have greater nutritional knowledge.

Practical strategy: A step-by-step guide

1. Compare similar products: Check values per 100 g or per serving to see which has less sugar or fat.
2. Prioritize visual FOP systems (Nutri-Score or traffic lights), if available.
3. Avoid misleading claims: Terms like “light,” “high in protein,” or “natural” don’t guarantee a healthy product.
4. Watch out for problematic ingredients such as corn syrup, hydrogenated oils, or hidden sodium.
5. Use apps or educational guides to help you interpret information quickly.

Conclusion

The key to reading nutrition labels isn’t memorizing numbers, but training your eye to spot essential nutrients and warning signs. With knowledge and practice, you can turn the information on labels into choices that truly improve your health.

BIBLIOGRAPHY

(1) Giró-Candanedo et al. (2022). Use and Understanding of Nutrition Labels: Impact of Diet Attachment. Foods. 11(13):1918. PMCID: PMC9266186 pubmed.ncbi.nlm.nih.gov+3PMC+3SpringerLink+3

(2) Persoskie , Hennessy E., Nelson W.L. (2017). US Consumers’ Understanding of Nutrition Labels in 2013. Preventing Chronic Disease, 14:170066 CDC

(3) Krishnaraj et (2024). Impact of Food Labels on Consumer Purchasing Decisions. European Journal of Nutrition & Food Safety 16(11):44-51 journalejnfs.com

(4) Persoskie et al. (2011). Nutrition knowledge’s effect on label use. PubMed Review National Academies Press+4pubmed.ncbi.nlm.nih.gov+4PMC+4

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