A brittle hair is a hair that has aged prematurely. The causes of aging are different. They are due to chemical treatments, such as excessive mechanical styling, the styling, coloring, straightening ... repeatedly. As this hair has aged in advance, its keratin has lost its elasticity, its resistance. Keratin resistant least all of these chemical or mechanical manipulation, the hair is less protected, or at all. Result: the hair deteriorate and become brittle.
