What is a Keratin Hair Conditioner? Keratin is a protein that forms the structure of hair. When our hair is damaged, it loses keratin, making the ends thin and prone to breaking. A keratin hair conditioner restores lost keratin and develops a protective layer around every single piece of hair. Unlike standard conditioners, which just moisturize the surface, a keratin hair condit... https://cerisenaturals.com/blogs/organic-skin-care/keratin-hair-conditioner-for-silky-smooth-hair