Therapy-G Antioxidant Shampoo for thinning or fine hair is Step 1 in the Therapy-G System and can be used every time you shampoo your hair. It neutralizes toxins and free radicals in the follicle and inhibits DHT. It allows the hair follicle to function properly. Blood circulation to the scalp is stimulated, bringing nutrients to build healthy hair. The shampoo's antioxidants work to reduce free radical damage in the follicle, on the scalp, and on each hair shaft. This shampoo restores natural moisture levels to hair. You may feel a tingling effect on your scalp with this shampoo.