KERASTASE FUSIO DOSE CONCENTRE NUTRITIVE Intensive Nourishing Care for Very Dry Hair. Kerastase Fusio-Dose Concentre Nutritive is a part of the Fusio Dose family of professional hair treatments designed to resolve concerns in dry and frizzy hair. It is enriched with highly concentrated active ingredient Niacinamide that deeply hydrates the hair, and instantly transforming it […]