The moisturizing hair mask.

A hair is primarily made up of keratin, a hydrophobic fibrous protein. The outer layer that surrounds the hair is called the cuticle. It consists of keratin scales and a fatty lipid film.

It is crucial to distinguish between dry hair and dehydrated hair. These two issues are different. Generally, dry hair lacks lipids or fatty compounds, while dehydrated hair is simply lacking in water.

Dehydrated hair is often due to damaged cuticles that no longer fulfill their protective role: they no longer retain water, which then evaporates excessively. The hair fibers become more sensitive to external aggressions and break more easily. The hair appears dull, tired, and loses its shine. It may also have a frizzy appearance.

Dehydrated hair is typically caused by intrinsic factors (insufficient overall body hydration, hair typex...) and/or extrinsic factors (stress, pollution, weather conditions, smoking...).

A hydrating mask is a treatment that contains hygroscopic compounds. By binding to the hair fiber, these compounds form a protective layer that smooths the hair cuticle and traps water molecules within the strands to maintain hair hydration. It typically acts immediately on hydration, resulting in shiny and tamed hair after treatment, making styling easier. In the cosmetic market, this type of product is generally available in cream or gel textures. It is suitable for all hair types, even the oiliest, and can be applied several times a week.