Peter Thomas Roth Retinolique Forte Vitamin A Products,for all skin types, excluding those sensitive to vitamin A. Chemically similar to RETIN-A, this light reddish-yellow water based serum helps reduce the appearance of fine lines & wrinkles, moisturizing while allowing skin to renew itself. Helps create a smoother, softer, more youthful looking appearance by helping to enhance the skin's natural rejuvenation process. May be applied over Power C products with caution. Read directions on bottle first.