This power serum plumps the skin to dramatically improve the appearance of fine lines and wrinkles. The Concentrate formula contains the highest level of exclusive Ultra-Reti™ stabilised Retinol microparticles, an advanced Retinol delivery technology. This product is part of the Ultra A Perfecting Range and is also available in two other strengths, Ultra A Perfecting Serum Mild and Ultra A Perfecting Serum, as well as the Ultra A Perfecting Eye Cream. This product is suitable only for skin pre-conditioned with Ultra A Skin Perfecting Serum. Paraben free. We recommend this product be applied in the evening.