POWERFUL HAIRCARE, BACKED BY SCIENCE & NATURE Watermans is dedicated to transforming hair health with premium, scientifically formulated products designed for all hair types. Our Grow Me Shampoo combines the power of Biotin, Rosemary, Caffeine, Niacinamide, Argan Oil, Allantoin, and Lupin Protein to energize the scalp, strengthen hair from the root..