Professional Blog
Health. Performance. Over time.
Professional articles on sleep, energy, metabolic balance, and women's health.
👩‍🔬
Galit Perez
Co-Founder & Medical Director · LongevLife
01
Sleep and Recovery: Why Recovery Became the Keyword
⏱ 6 min
02
Why does everyone feel tired all the time?
⏱ 6 min
03
Metabolic Balance: How the Body Responds to Our Lifestyle
⏱ 5 min
04
Women's Health: Wellness Tailored to Real Life
⏱ 6 min
05
Feeling good and looking the part
⏱ 5 min
Sleep · Recovery
Article 01 of 05

Sleep and Recovery: Why Recovery Became the Keyword of the New Health World

👩‍🔬
Galit Perez
Co-Founder & Medical Director · LongevLife
⏱ 6 min read · May 2025

In the past, when we talked about health and a healthy lifestyle, we focused mainly on three things: nutrition, weight loss, and exercise. These remain important, but the world of Wellness and Longevity has undergone a deep conceptual shift in recent years. The body's ability to recover has become one of the most significant factors for health, performance, and quality of life, and quality sleep is the foundation of all of it.

What is interesting is that most people understand they need to sleep. They know that 7 to 9 hours of sleep is the standard recommendation. But this knowledge does not always translate into better sleep in practice. The reason is that we do not always understand what actually happens in the body during sleep, and why it is so critical.

What happens in the body while we sleep?

Quality sleep is much more than passive rest. During the night the body performs active work: Hormonal balance which affects mood, appetite, and energy levels; Muscle recovery and tissue repair; Nervous-system regulation; andInformation processing in the brain that enables learning and creativity.

When sleep is not of good quality, even if the number of hours looks fine on paper, all these processes are impaired. This explains why many people experience fatigue, increased stress, and reduced concentration, even when they seemingly slept enough.

🔬 What the research showsInsufficient or poor-quality sleep is linked to higher cortisol levels, impaired insulin sensitivity, and a rise in inflammation markers in the blood. All of these are directly related to accelerated aging and a decline in healthspan.

The new tools for measuring sleep

One of the interesting changes in recent years is the entry of advanced monitoring technologies into everyday use. More people today use wearables and smart rings to better understand their sleep quality. The data, such as HRV, deep sleep, light sleep, and REM, allow a more accurate picture than subjective feeling can give.

People who start using such tools sometimes discover they sleep less well than they thought. This is not necessarily bad news. It is a starting point for deliberate change.

What affects sleep quality?

Caffeine and its timing

The half-life of caffeine in the body is 5 to 6 hours. Coffee in the late afternoon continues to affect the nervous system into the evening. Not everyone feels the effect directly, but it can be seen clearly in sleep data.

Bedroom temperature

The body needs to lower its internal temperature to enter deep sleep. A room that is too warm makes the process harder. The optimal temperature for sleep is 17 to 19 degrees Celsius.

Blue light and screens

The blue light emitted from screens suppresses the production of melatonin, the hormone that signals to the body that it is time to sleep. An hour without screens before bed is one of the most research-backed recommendations.

Supplements as part of an evening routine

In addition to habits, there is a rise in the use of personalized supplements. Magnesium glycinate is one of the most studied in this context, supporting muscle relaxation and GABA activity. L-Theanine is linked to improved sleep quality without causing drowsiness during waking hours. These are not magic solutions, but they can support a healthy evening routine.

In the new health world, recovery is not a bonus. It is a real foundation for daily function and quality of life over time. Before looking for a complex solution, it is worth checking the basics: sleep, water, nutrition, and movement.

In my clinical work, I meet many people who invest resources in supplements and special diets but ignore sleep. Sometimes the simplest path to improving overall health starts at night.

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Energy · Performance
Article 02 of 05

Energy and Performance: Why does everyone feel tired all the time?

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Galit Perez
Co-Founder & Medical Director · LongevLife
⏱ 6 min read · May 2025

Many people describe a persistent feeling of fatigue, even when they sleep enough hours, eat reasonably, and exercise. In the modern world, a combination of workload, stress, screen time, and unbalanced nutrition significantly affects energy levels. But there is a component here that is not always discussed.

Energy is not just a feeling of alertness. It is the way the body produces, manages, and uses energy at the cellular and metabolic level. Once you understand this, it becomes clear why superficial changes, like drinking another coffee, do not solve the problem over time.

Performance Wellness and why it grew so fast

In recent years the field of Performance Wellness has become popular. Not only among athletes, but among people who want to improve focus, concentration, daily performance, and a sense of vitality. Success at work, in relationships, and in daily life is directly linked to energy levels, and more people are beginning to understand this.

🔬 The cellular connection most people overlookThe mitochondria, the organelles found in every cell, are responsible for producing ATP, the body's energy molecule. With age and under the influence of an unsupportive lifestyle, mitochondrial function declines. This is one of the main causes of chronic fatigue.

Daily routines instead of instant solutions

Instead of looking for instant solutions, more people today build daily routines that address the problem at its root:

  • Balanced nutrition that supports glucose stability: Sharp fluctuations in blood sugar are one of the common causes of energy crashes. Combining protein and healthy fat in every meal helps maintain stability.
  • Hydration: A body that is even mildly dehydrated shows a noticeable decline in concentration and cognitive ability.
  • Quality sleep: The foundation on which all other efforts rest.
  • Tailored exercise: Consistent moderate-intensity movement improves mitochondrial function over time.

Functional supplements to support energy

Once the basics are in order, certain supplements can add value. CoQ10 in its Ubiquinol form is essential for the mitochondrial respiratory chain, and its production declines with age. Vitamin B12 and B Complex are essential cofactors in cellular energy production processes. Magnesium is involved in more than 300 enzymatic reactions in the body, many of them related to energy production.

The goal is not to work more. The goal is to function better over time, with less effort and more presence in daily life. This is what we call Performance Wellness in the Longevity approach.

What should you check first?

Before spending money on supplements, it is worth starting with basic blood tests: vitamin D, B12, iron and ferritin, thyroid function, and a blood count. Nutritional deficiencies are a common cause of unrecognized fatigue.

⚠️ Chronic fatigue that does not improve with lifestyle changes requires a focused medical evaluation.

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Metabolism · Health
Article 03 of 05

Metabolic Balance: Understanding How the Body Really Responds to Our Lifestyle

👩‍🔬
Galit Perez
Co-Founder & Medical Director · LongevLife
⏱ 5 min read · May 2025

One of the most discussed fields in the health world today is Metabolic Health. The term sounds medical, but in practice it relates to everyone's daily life: energy levels throughout the day, feelings of hunger and fullness, the body's response to food, and overall recovery ability.

Many people experience energy crashes, fatigue after meals, or a general sense of imbalance. Sometimes it is a combination of nutrition, stress, and lack of sleep that together create a complex picture.

What is metabolic balance, exactly?

Simply put, good metabolic health means the body processes and uses nutrients efficiently. This includes proper regulation of glucose levels, normal insulin sensitivity, and stable energy management.

When metabolic balance is disrupted, even mildly and undetected in standard tests, people may experience fatigue after eating, energy crashes at certain hours, and difficulty concentrating.

🔬 The point most tests missFasting glucose values in the "normal" range do not necessarily tell the whole story. The glucose response after a meal can be problematic even when the fasting value is completely normal.

What affects metabolic balance?

  • Meal composition and timing: What we eat and when directly affects the glucose response.
  • Sleep: A single night of insufficient sleep is enough to impair insulin sensitivity.
  • Stress: High cortisol over time interferes with metabolic balance.
  • Exercise: Movement improves insulin sensitivity and helps stabilize glucose levels.

The personalized approach

In the modern Longevity world, more people turn to a personalized approach. They use test data and monitoring technologies to understand their specific body, not based on population averages. What works for one person does not necessarily work for another.

Functional nutrition, quality protein, and healthy fats, alongside daily lifestyle support, become a central part of how people choose to manage their health. Not as a diet, but as a way of life.

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Women's Wellness
Article 04 of 05

Women's Health: Wellness Tailored to Real Life

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Galit Perez
Co-Founder & Medical Director · LongevLife
⏱ 6 min read · May 2025

Many women deal with a significant daily load: career, family, stress, lack of sleep, and sometimes also hormonal changes that affect their general feeling, energy levels, and quality of life. What makes this situation unique is that generic solutions do not always fit the specific needs of women.

In recent years the world of Women's Wellness has grown rapidly out of this understanding. More studies include separate samples of women, and more professionals treat women as a population with specific needs.

The differences worth knowing

  • Sensitivity to hormonal changes: Estrogen and progesterone levels change over the menstrual cycle, and each phase has a different effect on energy, sleep, mood, and nutritional needs.
  • Common nutritional deficiencies: iron, due to menstruation; calcium and D3, due to osteoporosis risk; and B12.
  • A different response to stress: Studies point to different response patterns of the HPA axis in women compared to men.
  • Changes over the lifespan: Each stage, from adolescence to menopause, brings physiological changes that require adaptation.
🔬 What we see in practiceIn a set of results I analyzed recently, about half of the women aged 20 to 45 showed ferritin below 30 - a value considered borderline by standard ranges, but problematic from a functional standpoint. Iron deficiency, even without defined anemia, is linked to fatigue and reduced cognitive performance.

What are women looking for today?

More women are looking for balance, stable energy, better sleep, and support for their daily routine. Not extreme solutions, not strict diets, and not routines that require two hours a day. They are looking for an approach that respects the reality they live in.

The approach I recommend

The approach does not focus on perfection. It focuses on building a more stable and healthy routine, one that fits real life:

  • Start with blood tests that include ferritin, vitamin D, B12, and thyroid function.
  • Get the basics in order: sleep, nutrition, hydration, and movement.
  • Add tailored support according to specific needs, not according to what works for someone else.
  • Listen to the body and adjust according to the changes that occur throughout the month.
Most importantly: do not compare yourself to men or to other women. Your body is unique, and your protocol should be unique accordingly.

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Longevity · Healthy Aging
Article 05 of 05

Feeling good and looking the part: the new approach of the Longevity world

👩‍🔬
Galit Perez
Co-Founder & Medical Director · LongevLife
⏱ 5 min read · May 2025

For years the Wellness world focused mainly on external appearance. Diets, fitness routines, aesthetic treatments. All aimed at the question "how do I look?" Today the approach is changing.

More and more people understand that a sense of vitality, energy, good sleep, and daily balance affect not only how we feel, but also how we look. There is a real physiological basis for this.

The connection between the inside and the "face"

When the body is under continuous load, stress, and lack of sleep, it affects the overall appearance:

  • High cortisol over time impairs collagen production and accelerates tissue breakdown. The skin loses elasticity faster.
  • Insufficient sleep causes puffiness, paleness, and a look of fatigue that cannot be hidden.
  • Low-grade chronic inflammation is linked to skin and hair problems and to the overall rate of aging.
  • Unbalanced nutrition shows in the skin, hair, and nails before it shows in blood tests.
🔬 Healthy Aging vs Anti-AgingThe new Longevity world is not about "looking younger" as a goal in itself. It is about Healthy Aging: supporting a lifestyle that lets the body function, recover, and feel its best over time. When that happens, appearance improves itself naturally.

The connection between health and aesthetics

In recent years a significant connection has formed between the health world and the aesthetics world. Not through invasive treatments, but through a combination of functional nutrition, quality supplements, good sleep, and daily Wellness routines.

People who invest in their internal health usually report an improvement in external appearance as a side effect. This is an important conceptual shift: instead of treating the symptom, you treat the root.

What does this mean in practice?

  • Omega-3 for skin health and reducing inflammation.
  • Vitamin C as a cofactor in collagen synthesis.
  • Sleep which allows the body to produce growth hormone needed for tissue repair.
  • Hydration which directly affects skin appearance.
  • Stress management which reduces the effects of chronic cortisol.
The new approach does not focus on perfection. It focuses on a sense of vitality and quality of life over time. When the body gets what it needs, it shows it.

In my clinical work, I meet people who come with one aesthetic goal and discover that the way there passes through basic lifestyle changes. External treatments can add to this, but cannot compensate for missing foundations.

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The articles were written by Galit Perez in her role as scientific advisor to LongevLife and are intended for informational purposes only. They should not be seen as a substitute for medical advice. Consult a doctor before changing your diet or taking supplements. For a medical emergency: 101. Privacy Policy · Terms