Our anti-white hair serum contains Polygonum multiflorum extract biotin and matrine root powder. It can repair damaged hair follicles promote hair growth effectively reduce white hair density moisturize hair and scientifically make hair black within 4 weeks. Its application is simple: After washing your hair apply 1-2 drops of hair essence to wet hair and gently massage it from the roots to the hair strands for 2-3 minutes (daily application works best). Strengthen scalp health reduce hair loss strengthen hair roots and make hair darker and thicker