Designed for both daytime and nighttime repair, this serum is your secret weapon for healthy-feeling and radiant hair. Apply to mid-lengths and ends of hair, start with 2 pumps and add more as needed. Apply to damp hair after washing for immediate smoothness. Or for a deep overnight treatment, apply a few pumps to dry hair before bed. Reapply day and night as desired to maintain enviable, healthy-looking hair in between washes. Everyone's hair has different needs; some may wish to apply only once, while others prefer to reapply or layer. For the best results, use as a full regimen with Acidic Bonding Concentrate Shampoo, Conditioner and Leave-In Treatment. In case of contact with eyes, rinse immediately