✨ Rejuvenating the Body: A Scientific Approach to Slowing Down the Ageing Process

Ageing is a natural biological process that affects every person without exception. However, the rate of ageing varies from person to person: some look and feel younger than their actual age, while others look and feel older. Modern science understands the mechanisms of ageing better and better and offers evidence-based strategies that make it possible to slow down age-related changes and preserve quality of life for many years. It is important to understand that rejuvenation is not a magic pill but a comprehensive approach that includes nutrition, physical activity, skin care and psychological well-being.

The biology of ageing: why we age

At the cellular level, ageing is determined by several key mechanisms. Telomeres — protective "caps" at the ends of chromosomes — shorten with each cell division. When telomeres become too short, the cell loses its ability to divide and enters a state of senescence — cellular ageing. Such cells do not die; instead, they accumulate in tissues, releasing inflammatory substances and accelerating the ageing of surrounding healthy cells.

Free radicals — highly reactive molecules with an unpaired electron — damage DNA, proteins and the lipids of cell membranes. This process is called oxidative stress. The body has its own antioxidant defence systems, but with age their effectiveness declines while the burden increases.

Glycation — the binding of proteins by sugar molecules — leads to the formation of advanced glycation end products (AGEs). They accumulate in tissues, making them stiff and brittle. Glycation of collagen is one of the reasons why the skin and blood vessel walls lose their elasticity. That is why excess sugar in the diet accelerates ageing.

Mitochondrial dysfunction also plays an important role: with age, the cells' power stations work less efficiently, producing more free radicals and less energy, which affects the functioning of all organs and systems.

Skin ageing: what happens with age

The skin is the most visible indicator of age. From the age of 25, collagen production decreases by 1–1.5% every year. Collagen is responsible for the firmness and strength of the skin, and elastin for its ability to return to its original shape after stretching. With age, both proteins degrade, the skin becomes thinner and loses its firmness, and wrinkles appear.

Photoageing — damage to the skin caused by ultraviolet light — is responsible for 80% of the visible signs of facial ageing. UVA rays penetrate the deep layers of the skin and destroy collagen, while UVB rays cause sunburn and pigmentation. Photoageing shows up as uneven pigmentation, deep wrinkles, coarsening of the skin and spider veins.

Besides ultraviolet light, the skin is damaged by air pollution (PM2.5 particles penetrate the pores and intensify oxidative stress), blue light from screens (although its effect is less significant than that of UV), dry air and temperature changes.

Factors that accelerate ageing

The rate of ageing is determined by a combination of genetics (20–30%) and lifestyle (70–80%). The main accelerating factors are:

• Ultraviolet radiation is the main external enemy of youthful skin. Even 10 minutes without protection on a sunny day sets off the damage process.
• Smoking narrows blood vessels, reduces the supply of oxygen and nutrients to the skin, and destroys collagen and elastin. A smoker's face ages 10–20 years faster.
• Chronic stress raises the level of cortisol — a hormone that breaks down collagen, impairs the skin's barrier function and suppresses immunity.
• Lack of sleep. During deep sleep, growth hormone is produced, which stimulates tissue repair. Chronic sleep deprivation (less than 7 hours) accelerates skin ageing by 30%.
• Excess sugar triggers glycation — the "candying" of collagen. The skin loses elasticity and becomes dull and prone to inflammation.
• Air pollution — fine particles and toxins penetrate the skin, causing chronic inflammation and the breakdown of its protective barrier.

Nutrition for longevity

A healthy diet is one of the most powerful tools for slowing down ageing. Research on the "Blue Zones" — the regions of the world with the highest concentration of long-lived people (Okinawa, Sardinia, Nicoya, Ikaria, Loma Linda) — has shown that the common features of their diets include an abundance of plant foods, moderation in eating and a minimum of processed products.

Antioxidants neutralise free radicals. Vitamin C (citrus fruits, bell peppers, kiwi) is essential for collagen synthesis. Vitamin E (nuts, seeds, avocado) protects cell membranes. Vitamin A and beta-carotene (carrots, pumpkin, spinach) support skin renewal.

Polyphenols are powerful plant antioxidants found in berries, green tea, dark chocolate, red wine and olive oil. Resveratrol from grapes activates sirtuins — proteins associated with increased lifespan in laboratory experiments.

Omega-3 fatty acids (oily fish, flaxseed, walnuts) suppress chronic inflammation — one of the main drivers of ageing. The Mediterranean diet, rich in omega-3s, is associated with a lower risk of cardiovascular disease, dementia and premature skin ageing.

Eating patterns also matter: moderate calorie restriction (by 15–20%) and intermittent fasting activate autophagy — the process of "clearing out" damaged cellular components, for the study of which Yoshinori Ohsumi received the Nobel Prize in 2016.

Physical activity and ageing

Regular exercise is one of the best-proven ways to slow down ageing. Physical activity affects the body in many ways:

• Cardio exercise (walking, running, swimming, cycling) strengthens the heart and blood vessels, improves blood supply to the organs and increases endurance. A study in the journal Circulation showed that regular aerobic exercise reduces the biological age of the cardiovascular system by 20–30 years.
• Strength training slows down sarcopenia — the age-related loss of muscle mass (1–2% per year after the age of 50). Muscle is metabolically active tissue, and preserving it supports metabolism, bone density and functional independence.
• Stretching and flexibility (yoga, Pilates) maintain joint mobility, improve posture and reduce the risk of injury. The deep breathing in these practices also lowers stress levels.

The WHO recommends at least 150 minutes of moderate or 75 minutes of vigorous aerobic activity per week, plus two muscle-strengthening sessions. However, even a 30-minute daily walk is much better than no movement at all.

Sleep and recovery

During sleep, the body launches key recovery processes. Growth hormone, released mainly during the deep sleep phase, stimulates collagen synthesis, muscle repair and cell renewal. Melatonin — the sleep hormone — is a powerful antioxidant that protects cells from damage.

Chronic sleep deprivation (less than 6 hours) raises cortisol levels, worsens insulin sensitivity, increases inflammation and weakens immunity. For full recovery, an adult needs 7–9 hours of good-quality sleep. Going to bed and getting up at the same time, airing the bedroom, avoiding screens for an hour before bed and keeping the temperature cool (18–20 °C) are the basic rules of sleep hygiene.

Skin care: the basics and active ingredients

Daily skin care is not a luxury but a necessity for slowing down visible ageing. The basic steps are:

• Cleansing — removing dirt and excess sebum. Gentle products with a neutral or slightly acidic pH preserve the skin's protective barrier.
• Moisturising — maintaining the skin's water balance. Hyaluronic acid retains moisture (1 gram binds up to 6 litres of water), and ceramides strengthen the lipid barrier.
• Sun protection — SPF 30+ every day, even in cloudy weather. This is the most effective remedy against photoageing.

Active ingredients with proven effectiveness: retinoids (vitamin A derivatives) — the gold standard of anti-ageing care, they stimulate cell renewal and collagen synthesis; vitamin C (L-ascorbic acid) — an antioxidant that lightens pigmentation and stimulates collagen; niacinamide (vitamin B3) — improves barrier function and evens out skin tone; peptides — protein fragments that stimulate the production of collagen and elastin; AHA/BHA acids — gently exfoliate dead skin cells and even out texture.

Brain health and psychological well-being

Ageing also affects cognitive functions. With age, information-processing speed, working memory capacity and the ability to multitask decline. However, the brain retains neuroplasticity — the ability to form new connections — at any age.

To maintain cognitive health, the following are recommended: intellectual challenges (learning languages or musical instruments, solving problems), social interaction (loneliness accelerates cognitive decline as much as smoking 15 cigarettes a day), physical activity (it increases blood supply to the brain and the production of the neurotrophic factor BDNF) and stress management.

A positive attitude towards ageing in itself prolongs life: research at Yale University has shown that people with an optimistic view of ageing live on average 7.5 years longer than pessimists.

Hormonal changes with age

Hormone levels change considerably over the years. In women, menopause (on average at 50–52 years of age) is accompanied by a sharp drop in oestrogens, which accelerates the loss of collagen (up to 30% in the first 5 years), the decline in bone density and the worsening of the lipid profile. In men, testosterone levels decline gradually — by 1–2% per year after the age of 30 (the so-called andropause), which affects muscle mass, energy and mood.

Growth hormone, melatonin and DHEA also decline with age. Hormone replacement therapy can compensate for the deficiency, but it should only be prescribed by a doctor, taking into account the risks and contraindications.

Cutting-edge research: what lies ahead

The science of ageing is experiencing rapid growth. Among the promising areas are:

• Senolytics — drugs that selectively destroy ageing (senescent) cells. In experiments on mice, removing such cells extended the healthy period of life by 25–35%.
• NAD+ and its precursors (NMN, NR) — NAD+ is essential for the functioning of sirtuins and mitochondria. Its level falls with age, and replenishing it in experiments improved metabolism and tissue function in old mice.
• Cell reprogramming — Yamanaka factors can "reset" the age-related epigenetic marks of cells, returning them to a younger state.

These technologies are still at the stage of research and clinical trials. But already today anyone can significantly slow down their own ageing using accessible and proven tools: a balanced diet, physical activity, good-quality sleep, sun protection and stress management. This is not a promise of eternal youth, but a reliable path to a healthy and active long life.