vitamin hair serum capsules contain vitamin C and retinol. It can enhance the toughness of hair and prevent severed heads and tails. Its application is simple: twist or cut the top of the capsule squeeze the essential oil into the palm of yhand apply the essential oil evenly to clean damp hair from the middle of the hair to the ends and finally blow dry the hair or let it dry in the air without rinsing. And can provide a variety of nutrients to promote hair health.