Combine lactic acid and hyaluronic acid: exfoliate then hydrate

A thick layer of dead cells slows down everything you put on it. This is the most concrete reason to combine a gentle acid with a humectant: the former paves the way for the latter.

How Exfoliation Changes Penetration

The stratum corneum, the outermost layer, is an effective barrier. When dead cells accumulate there, applied skincare products remain on the surface longer and are less effective.

Lactic acid breaks down the bonds that hold these cells together. What is applied afterwards reaches a better-prepared surface—the improvement affects the effectiveness of other products as much as the skin's appearance.

Two Naturally Occurring Molecules

Lactic acid is part of the skin's natural moisturizing factors. Hyaluronic acid is naturally present in the dermis, where it helps maintain elasticity. Neither is foreign to the body.

This kinship explains their tolerance. They are two of the best-accepted ingredients in cosmetics, and their combination is suitable for most skin types, including sensitive skin, with an adapted rhythm.

Application, and the Interval Between the Two

Lactic acid in the evening, on clean, dry skin. Wait twenty minutes. Then hyaluronic acid on slightly re-moistened skin, and a cream to seal. This delay allows the acid time to work at its pH.

On evenings without acid, hyaluronic acid alone, every day. This is the maintenance product for this routine; the acid is the intervention product, and the two are not applied at the same rate.

The Rhythm, According to Skin Type

Two acid applications per week to start, three afterwards if all goes well. Dry skin: two are enough, lactic acid being already moisturizing on its own. Sensitive skin: one only, doubled every three weeks.

It is necessary to avoid applying an acid effectively more often than necessary: beyond three times a week, the improvement reverses and the skin becomes reactive. The best result comes from a rhythm maintained for six months, not an intensity maintained for six days.

What to Expect

A more even texture in three to four weeks, a brighter complexion afterwards, and a feeling of comfort from the first application thanks to the moisturizing part. Nothing for established wrinkles.

Sun protection must accompany any exfoliation: the layer that emerges is younger and marks more quickly. This is the only real constraint of this protocol, and it is non-negotiable.

Suitable Products

The AHA peeling with lactic acid and hyaluronic acid combines the two in a single formula, which avoids the question of the waiting period. The radiance tonic with rose water and lactic acid offers a lower concentration for frequent use. The lactic acid page details the benchmarks.

Understanding What Each Does

Using hyaluronic acid means providing water and retaining it. Using lactic acid means removing what clutters the surface. The first acts on the state, the second on the structure—and the whole only works if both are present.

A hyaluronic acid base used alone eventually disappoints: the effect is immediate but never settles in. An acid used alone dries out. Together, they cover the needs of dull skin without any discomfort.

Available Forms

Lactic acid is found in low-concentration toners, serums, and ten percent peels. Hyaluronic acid comes in different molecular weights, and a good serum combines several. These different formats cover distinct uses rather than quality levels.

A product that combines both exists and simplifies the routine. It avoids the question of the interval between applications, which is a real advantage for those who don't want to count minutes.