Nutritive Nutri-Supplement Scalp Serum by Kérastase is a healthy moisturizing scalp serum for dry scalps. This is Kérastase's ultimate scalp care: a niacinamide serum that provides vitamins to a dry scalp to deeply nourish dry hair. This dry scalp serum has a non-greasy fluid formula that provides vitamins for a deeply nourished scalp. Acting like a nutrient supplement for the scalp, its milky, fast-absorbing texture makes it the best serum for dry hair. Up to +23% scalp moisture, immediately after application.(1) Bottle made of 20% recycled glass. (1)Clinical instrumental test results immediately after application of Nutri-Supplement Scalp Serum.