Nutritive Nutri-Supplement Scalp Serum 90ml by Kérastase is a healthy moisturizing scalp serum for dry scalps. This is our 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.