Dry Hair

The physiological causes of dry hair include a depletion of hydrolipidic film, which forms a barrier for the hair fiber against external stress factors.
Although hair tends to be naturally dry, chemical processes (coloring, bleaching) and mechanical processes (blow-drying, straightening) dehydrate hair. These factors are harmful to the keratin in the hair and increase the porosity of the cuticle. As a result, moisture contained in the hair fiber evaporates, leaving hair dehydrated.