Introduction: Hyaluronic acid, the pillar of skin hydration

A biomimetic active ingredient par excellence, hyaluronic acid (HA) is at the heart of research in dermatology and cosmetics. Naturally present in the extracellular matrix, it plays a central role in regulating hydration, tissue flexibility and cellular communication.

Its exceptional capacity to retain up to 1000 times its weight in water makes it an incomparable hydration vector and a major ally in the prevention of skin aging.

What is hyaluronic acid?

Hyaluronic acid is a glycosaminoglycan consisting of repeating units of glucuronic acid and N-acetylglucosamine. It is distinguished by:

• Its biomimetic structure , identical to that produced naturally by the body.
• Its bioavailability is adjustable , depending on its molecular weight (high, medium or low).
• Its multifunctional role in skin cohesion and regeneration.

The progressive decrease in its concentration in the dermis, from the age of 25, is directly correlated with the loss of elasticity, the appearance of fine lines and increased dehydration.

Mechanisms of action

Scientific research highlights several key functions of hyaluronic acid:

• Intracutaneous hydration : captures and retains water molecules to maintain optimal volume in the extracellular matrix.
• Mechanical plumping effect : by increasing osmotic pressure, it restores density and elasticity to the skin.
• Protective role : helps strengthen the skin barrier and limits the effects of oxidative stress.
• Indirect stimulation : promotes cell renewal and micro-tissue healing.

Scientific results

Numerous in vitro and in vivo studies confirm the benefits of hyaluronic acid:

• Increased skin hydration from the first hours of application.
• Reduction of dehydration fine lines and visible improvement in skin texture.
• Optimization of dermal density with formulations combining several molecular weights.
• Restoration of radiance and evenness of the complexion thanks to better organization of the extracellular matrix.

Cosmetic applications

Hyaluronic acid is used in a wide range of cosmetic treatments:

• Intensive low molecular weight serums for deep penetration.
• Moisturizing creams enriched with high molecular weight for surface action.
• Specific care for the eye contour or fragile areas, to smooth and protect.
• Technological devices (LED, microcurrents, cryotherapy) which optimize its diffusion and reinforce its biological effectiveness.

Conclusion

Hyaluronic acid is a fundamental active ingredient in modern cosmetics . Thanks to its dual action—immediate on the surface and long-lasting in depth—it provides a comprehensive response to the loss of hydration and skin density.

At Innadermys , we harness its potential in our protocols and formulations. Discover our Age Defy Ritual set, a synergy of treatments enriched with hyaluronic acid and advanced technologies, designed to intensely hydrate, visibly smooth fine lines and restore skin elasticity.