To fulfill their cleansing functions, soaps contain cleaning agents: the famous surfactants. True soap is already a type of surfactant. It results from a chemical reaction called saponification between a fat (a triglyceride) and a base or alkaline substance.
Surfactants can be natural, synthetic, gentle, but also foaming, irritating... The surfactants to avoid when choosing a soap, especially if you have sensitive skin, are the sulfated detergents such as Sodium Lauryl Sulfate and its cousin, Sodium Laureth Sulfate. Extremely detergent, these surfactants are also drying, even irritating to the skin, mucous membranes, and can cause quite intense tingling if they come into contact with the eyes.
As a reminder, we have decided to apply the precautionary principle and not to introduce sulfates into our cleansing products for the face and hair. Find here the blacklist of ingredients. In all our Typology cleansing products for the scalp, face, or body, we exclusively use gentle and skin-friendly surfactants.
Furthermore, in the composition of soaps, other ingredients are sometimes added to the previously mentioned surfactants such as preservatives, fragrances, dyes, etc., in synthetic or natural form. These substances can be irritating for the most sensitive skin and/or have severe environmental consequences (water pollution, over-packaging...).