Doo Gro Triple Strength Hair Vitalizer help hair to grow. Doo Gro Triple Strength Formula can be used on braided hairstyles, hair weaves, curl relaxed or color treated hair as well as natural hair. Doo Gro Triple Strength Hair Vitalizer is also ideal for use on thinning areas of hair around the face of either men or women. This hair growth enhancing product can even be used on children to enhance the fullness and growth rate of their hair. This hair grow treatment is fortified with hops, vitamin A, vitamin D, vitamin E, horsetail plant extract and cherry bark.