What Is A Keratin Hair Treatment
Keratin hair treatments (also known as Brazilian hair treatments) smooth out and straighten wavy or curly hair. They’re very popular, but these treatments rely on formaldehyde (a known carcinogen when inhaled), are also very controversial. How It Works Keratin is a protein that is naturally found in hair. It is not, however, responsible for taming the frizz that this treatment is famous for. That job relies on the formaldehyde found in the formula....