Hair cycle: everything you need to know about the different phases of hair
In addition to their aesthetic role, hair has several functions: they play a thermoregulatory role by protecting the head from cold and heat, and help prevent shocks, etc. What is hair? What is it made of? “A hair is composed mainly of 90% protein (keratin and melanin) and 10% water, lipids, trace elements (iron, zinc, … Read more