NIB, Sealed, Unopened Full Size 1.0 oz This multi-effect retinal night serum uses the power of retinaldehyde (the most potent retinoid next to an Rx) to smooth textured and blemished skin, improve the look of fine lines and wrinkles, and brighten uneven skin tone. Formulated with niacinamide, essential ceramides, and adaptogens. 0.15% Stabilized Retinaldehyde, 5% Niacinamide, Adaptogens + Ceramides