Doo Gro Tingling Growth Shampoo with Dandruff control. Doo Gro Tingling Growth Shampoo with Dandruff control helps 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 while controlling flaking. Its natural ingredients also control dry, flaky and itchy scalps. Safe to use on hair that is relaxed, curled, natural, dry, over processed, breaking or damaged. Stops itching flaking. Dandruff control formula. Cleanses scalp to promote strong, healthy growing hair.