DOO GRO - MEGA THICK LEAVE-IN GRO STRENGTHENER 10OZ The product Mega Thick Leave In Gro Strengthenerfrom Doo Gro is enriched with special ingredients such as bee wax, botanical thickeners, shea butter, oat protein and vitamins which help promote thick and strong hair. It helps to protect the hair from being damaged due to ill effects of chemicals. It is safe for all types of hair, and also for children. This lotion moisturizes the hair and makes it smooth and adds strength to it.