La science du cuir chevelu
Sous vos cheveux,
une peau.
On remarque les cheveux. On pense moins à la peau qui les porte. Comprendre cette peau, c’est le point de départ de notre démarche.
Comprendre le cuir chevelu
Three landmarks
The skin. Its surface. The hair.
The scalp is skin covered with hair. It should not be confused with the lengths: caring for one and the others addresses different questions.
The epidermis, on the surface
The epidermis is the outermost layer of the skin. Beneath it lies the dermis.
A barrier function
The skin protects the body from its environment and helps limit water loss.
The follicles, in the skin
Hair emerges from follicles in the skin. The visible part of the hair extends above its surface.
Understanding the evidence
One ingredient doesn't tell the whole story.
The name of an active ingredient is a starting point. Its concentration, the formula it is part of, and the conditions of the study also matter.
What to look for in a study?
The product or ingredient studied, the method, the population, the duration, and the observed result. These elements help clarify the scope of the conclusion.
Ingredient and finished product: what’s the difference?
A study on an ingredient describes that ingredient under given conditions. It does not, on its own, demonstrate the effects of a serum containing it.
What evidence is there about Le Geste?
No study on the Le Geste formula is presented on this page. Hydration and comfort refer to our skincare goals, without any guaranteed results or timeframe.
For questions about the composition or use, contact us.
What about hair loss?
The Gesture is not intended to treat or prevent hair loss. If you are concerned about it, seek advice from a dermatologist.
La source de ces repères
National Institutes of Health — Healthy Skin : structure de la peau, fonction de barrière et follicules. Consulté le 29 octobre 2026.
Cette ressource porte sur la peau. Elle ne constitue pas une étude de Le Geste.