Receive FREE Kerastase Nutritive Hair Care Products. Nutritive hair care collection is specially formulated to treat dry to severely dry hair. The complete collection of ultra moisturizing, hydrating and nourishing hair care products includes a shampoo, conditioner, hair mask, leave-in treatment and best-selling and award-winning 8 hour magic night hair serum. The result is hydrated hair, softer hair and healthier hair. If you are a BzzAgent member, check your email to see if you have been invited to apply for this campaign. Register for BzzAgent for future promotions. US only.