longevity cosmetics

Skin Aging: What Our Skin Tells Us About Time

Written by EMA TAILLANDIER on April 15, 2026, updated on April 22, 2026

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Summary

Skin aging: a biological process

The skin doesn't age. It adapts, and it does so with a precision that science is only just beginning to understand.

What we see on the surface: wrinkles, a loss of firmness, and a change in radiance. What’s happening beneath the surface: a gradual slowdown in cell turnover, reduced production of collagen and elastin, and a thinner skin barrier. These are natural, universal, and deeply complex biological processes.

The work of Professor Jean-Marc Lemaître, a pioneer in longevity research, now offers a different perspective on this phenomenon. What matters is not correcting the effects of aging, but preserving the cells’ ability to maintain their functions for as long as possible. When applied to the skin, this approach changes everything.

What the skin reveals over time

The signs of skin aging are not flaws. They are the visible manifestation of profound biological changes: the epidermis renews itself more slowly, the dermis loses its density, and the most exposed areas show the first signs.

Understanding these signals allows us to respond appropriately—not to eliminate them, but to support the skin as it changes.

The most common signs: fine lines and wrinkles, loss of firmness, an uneven complexion, thinner skin, and sometimes drier skin.

Cellular mechanisms: what happens at the cellular level

At the cellular level, skin aging is driven by several well-defined processes.

In the epidermis, the keratinocyte renewal cycle—which lasts about 28 days in a young adult—gradually lengthens. Dead cells remain on the surface longer. The complexion becomes dull.

In the dermis, fibroblasts become less active. There is less collagen and less elastin. The supportive structure weakens, and the tissues lose their firmness.

Added to this is glycation: a chemical process in which sugars bind to proteins such as collagen, gradually stiffening the skin’s fibers. It is a subtle mechanism, but one that has a significant impact on the skin’s elasticity.

Contemporary research on longevity goes even further: aging also depends on the ability of cells to maintain their repair mechanisms. This is precisely the area that LBA is exploring.

Oxidative stress: the silent enemy

Oxidative stress is one of the main factors contributing to extrinsic skin aging. When free radicals overwhelm the body’s natural defenses, they damage cells and break down collagen and elastin.

Factors that exacerbate it: excessive sun exposure, air pollution, smoking, chronic stress.

Protecting the skin from these harmful factors is not optional. It is a biological necessity.

How Diet Affects the Skin

The skin is closely dependent on what the body takes in. Vitamins, minerals, and essential fatty acids support the skin’s biological processes. Conversely, refined sugars promote glycation and weaken the skin’s proteins.

The most beneficial nutrients: antioxidants from berries, vitamins from green vegetables, omega-3 fatty acids from fatty fish, and polyphenols from plants.

Plants: The Science of Life at the Service of the Skin

Over the course of evolution, certain plants have developed remarkable strategies to protect their tissues from damage. Peonies, white lilies, and irises—these species possess a natural ability to regenerate that cosmetic researchers are now working to understand and harness.

At LBA, this belief is at the heart of every formula. plant stem cells, cultivated in bioreactors to ensure absolute purity and concentration, deliver this botanical intelligence directly to the skin’s surface.

Preventing skin aging: a comprehensive approach

Sustainable skincare is about more than just applying a product. It is based on a holistic approach: protecting the skin barrier, supporting cell renewal, minimizing environmental stressors, and nourishing the skin from within.

The key principles: daily sun protection, a regular and appropriate skincare routine, a diet rich in protective nutrients, and minimizing exposure to environmental stressors.

A Different Approach to Time

At LBA, skin aging is not an enemy to be fought. It is a biological process that should be supported with precision, science, and respect for life.

The skin is an organ. It changes. It speaks. The challenge is to learn to listen to it and give it the right tools to maintain its vitality over time.

That is our definition of longevity .

Q&A

What are the signs of skin aging?

Wrinkles, loss of firmness, a less radiant complexion, thinner skin. These are biological signs, not flaws.

What are the three types of skin aging?

Intrinsic (genetic and cellular), extrinsic (environmental), and hormonal.

How can you slow down skin aging?

Sun protection, a balanced diet, a tailored skincare routine, and mindful lifestyle choices.

Which foods accelerate skin aging?

Refined sugars and ultra-processed foods promote glycation and weaken the skin's proteins.

What foods are good for your skin?

Red fruits, green vegetables, fatty fish, nuts, and plants rich in polyphenols.

What is the skin's worst enemy?

Excessive sun exposure, the primary cause of extrinsic skin aging.

At what age does skin aging begin?

The first biological changes begin in one's thirties.

Can plants help the skin?

Certain plant species possess remarkable protective and regenerative properties; this is at the heart of the LBA approach.

Is it possible to prevent skin aging in the long term?

We can support these processes and maintain their vitality—and that is precisely the goal of regenerative cosmetics.

Why is it important to understand skin aging?

Because understanding your skin allows you to care for it properly and consistently.

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