Synopsis This mask, which contains biotin, niacinamide, and castor oil, strengthens hair strands, nourishes the scalp, and visibly minimizes split ends for longer, healthier hair. Advantages nourishes the scalp and lengths of hair to lessen split ends and hair breakage. gives hair a healthy appearance and feel. Recommended Usage Rinse and then apply to towel-dried hair. After 3-5 minutes, remove and thoroughly rinse. Utilize once a week or more.