1.be rich in active amino acid 2.suited to kraurotic hair 3.absorb quickly. 4. OEM is welcomed. Natural Amino Acid Hydrotherapy Hair Treatment This product is rich in active natural amino acid, which suited to kraurotic hair. It can penetrate into the inner hair to supply nutrient, restore hair structure. after using, hair will be charming and shine. UsageTake this product into the vessel, then ...