Doo Gro Leave-In Growth Treatment promotes beautiful, healthy hair by strengthening damaged areas and nourishing scalp to stimulate new hair growth. Doo Gro Leave-In Growth Treatment's light formula is a unique non-greasy, non-oily formula. It restores luster that is lost due to daily styling and chemical treatments. Doo Gro Leave-In Growth Treatment leaves hair deeply conditioned, soft and more manageable.