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A global approach
The HAIR RITUEL by Sisley hair care routine acts to condition both the scalp and the hair fiber for global action.
The root of a hair, also called the hair bulb, is where the hair is produced. This is where the cells responsible for the formation of the hair fiber and its color are concentrated.
The sebaceous gland in contact with the hair follicle provides the sebum necessary for the protection, shine and suppleness of hair.
The hair fiber consists of three layers.
The medulla forms at the center of the hair.
The cortex constitutes the actual structure of the hair fiber. Its cells contain melanin, which gives hair its color, as well as keratin, responsible for the resistance and elasticity of the hair.
The cuticle, which is the outer layer, protects the cortex from damage and provides the hair with shine.
The hair fiber is composed primarily of keratin (approximately 88%), which provides it with resistance and elasticity.
The lipids present mainly in the intercellular cement of the cortex and the cuticle provide the hair with a certain degree of impermeability and ensure cell cohesion in the hair fiber.
Melanin is responsible for the color of hair.