SPECIALISTS retinol & hyaluron cell fluid 50 ml SPECIALISTS retinol & hyaluron cell fluid 50 ml is an anti-aging serum that helps reduce wrinkles, fine lines and other signs of aging. It is formulated with retinol and hyaluronic acid, two powerful ingredients that work together to improve the appearance of skin. The serum also helps to reduce inflammation and improve skin elasticity. It can be used both morning and night for best results.