The basics Intense hydrating serum tailored to all skin types with a fresh and smooth texture.  The benefits Hypoallergenic, non-comedogenic and has a an allergen-free fragrance. Also makes for an excellent moisturizing makeup base.  The uses After cleansing and toning, apply Hydrabio Serum on face and neck in the morning and evening. The bottom line Its hydrating effect is both immediate and lasting: it softens your skin and brings back radiance.