SkinCeuticals Retinol products help stimulate cell regeneration and build collagen to diminish the appearance of fine lines, wrinkles, and age spots from both photo-aging and intrinsic aging. Perfect entry level retinol with a non-irritating formulation. SkinCeuticals Retinol products help stimulate cell regeneration and build collagen to diminish the appearance of fine lines, wrinkles, and age spots from both photo-aging and intrinsic aging. Perfect entry level retinol with a non-irritating formulation.