What is hyaluronic acid?

A molecule that the skin already produces on its own. Hyaluronic acid is a polysaccharide naturally present in the dermis, whose main function is to retain water and keep the tissue structure hydrated, flexible, and voluminous. Over time, its concentration decreases, leading to increased dryness, loss of elasticity, and more prominent lines.

It has been used in cosmetics for decades, but not always in its pure acid form. Most products work with sodium hyaluronate (Sodium Hyaluronate), its salt form: more stable, more water-soluble, and better performing in formulation. The result on the skin is practically the same, and in many cases, superior.

How it works

It acts as a humectant, drawing water from the outside into the superficial layers of the skin and retaining it there. A single molecule can hold up to 1,000 times its weight in water. This explains the immediate plump effect noticed after application.

What many don't know is that not all hyaluronic acid acts the same; it depends on the molecular weight. High molecular weight acts on the surface: it hydrates, smooths, and gives that plumper appearance immediately. Low molecular weight penetrates deeper, improving hydration in the inner layers and working on elasticity with continuous use. The most complete formulas combine various molecular weights to achieve both effects simultaneously, as in this multi-molecular weight serum.

Properties and benefits

• Deep and immediate hydration. It effectively attracts and retains water in the skin, improving comfort and softness from the first application.
• Plump effect. Well-hydrated skin appears juicier and has less noticeable superficial lines. It is not a filler; it is noticeable hydration.
• Improved elasticity and firmness. With continued use, the skin better maintains its flexibility and responds with more resilience.
• Reinforcement of the skin barrier. It helps reduce transepidermal water loss and protect against dehydration caused by cold, wind, or dry environments.
• Suitable for all skin types. It is non-greasy and non-comedogenic. Dry, combination, oily, or sensitive skin, there are no excuses not to use it.

Usage and integration into routine

Morning and night, without restrictions. It goes in serum, before cream or oil, on slightly damp skin to maximize its ability to capture water from the environment.

Compatible with almost everything: vitamin C, niacinamide, bakuchiol, phytoretinol, beta-glucan. It does not cause conflicts and enhances the effect of accompanying active ingredients.

Curiosities and facts

In cow's eyes
It was first identified in 1934, in the vitreous humor of cow's eyes. Its name comes from the Greek hyalos, meaning "glass," due to its transparent and viscous appearance. It is not a recent discovery; it has been studied in medicine for decades before reaching cosmetics.

Biocompatible with a history
Before becoming famous in creams and serums, hyaluronic acid was used in ophthalmic surgery and wound treatment. Its biocompatibility is exceptional; the body recognizes it as its own because it is.

Not only in the skin
It is an essential component of the synovial fluid that lubricates joints and the vitreous humor of the eye. When joints "creak" with age, part of the explanation lies in the same loss of hyaluronic acid that affects the skin.

Recommended sealing
In dry climates or environments with heating or air conditioning, hyaluronic acid can have the opposite effect to what is desired if applied without an occlusive on top: not finding moisture in the air, it draws it from the deeper layers of the skin. The solution is simple: cream or oil afterward, always.

This is how it appears in the INCI: Hyaluronic Acid, Sodium Hyaluronate, Hydrolyzed Hyaluronic Acid, Sodium Hyaluronate Crosspolymer

Other active ingredients you might be interested in

Beta-glucan— a humectant that surpasses HA in water retention and adds soothing action.
Niacinamide— strengthens the skin barrier and complements the hydrating action of HA.
Vitamin C— antioxidant and luminosity, a classic and effective combination.
Squalane— the ideal light occlusive to seal hyaluronic acid hydration.