Think hair vitamins are the key to fast growth? Discover the real reasons your hair isn't growing and what truly impacts its ...

Per Kim, several nutritional deficiencies are linked to hair loss, including: “Hair growth is a slow process, with hair typically growing about half an inch per month,” explains Kim.

While it’s natural, an excessive amount can weigh your hair down and slow hair growth. The weekly hair treatment, which uses active ingredients, also includes 15% Vitamin C and other clarifying ...