Doo Gro Tingling Growth Shampoo promotes strong, healthy growing hair. Uses a vitamin and herb formula to relieve itchy scalp and stop dandruff. Doo Gro Tingling Growth Shampoo with dandruff control helps stimulate blood flow to the scalp to help promote strong, healthy, growing hair. Its unique formula gently cleanses and conditions hair, while it adds strength and returns hair to its natural healthy condition. Doo Gro Tingling Growth Shampoo with dandruff control moisturizes hair and scalp to relieve a dry, flaky and itchy scalp. Safe to use on hair that is relaxed, curled, natural, dry, over-processed, breaking or damaged.