The Rootist Strengthen Concentrated Shampoo for Damaged Hair The fermented fix for damaged hair, this sulfate-free shampoo is designed to minimize breakage, smooth frizz + boost shine. Ultra-concentrated so you only need half your usual amount. This gentle, hydrating shampoo is fermented to feed roots, scalp + hair the nutrition needed for next-level damage repair, frizz control and shine. Made with no added water, this formula is less wasteful, more powerful and ultra-concentrated, making this bottle equivalent to one two times its size.