Kerastase Nutritive Nutri-Supplement Scalp Serum 90mlNutri Supplement Scalp Serum by Krastase is a healthy moisturizing scalp serum for dry scalps. This is Krastase's ultimate scalp care: a niacinamide serum that provides vitamins to a dry scalp to deeply nourish dry hair & scalp. 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 scalp.