The H.A. Intensifier by SkinCeuticals is a hydrating serum that helps to improve the appearance of skin texture and firmness. It contains hyaluronic acid, which provides intense moisture and plumps the skin, reducing the appearance of fine lines and wrinkles. The product is fragrance-free, dermatologist-tested, and suitable for all skin types. However, it does not offer sun protection or specific benefits for acne, dark spots, or oiliness. Discontinued