The Organic Pharmacy Retinol Night Serum is for targeting fine lines, wrinkles, uneven skin tone and loss of firmness this nighttime. Retinol Serum also boosts collagen to restore radiance and elasticity. Use on its own or as a combination treatment with Four Acid Peel, Hyaluronic Acid or Stabilised Vitamin C Serum. Clinical Test Results: Clinically proven to decrease pigmentation and reduce the number (-24%), surface (- 50%) and length (-37%) of wrinkles as assessed after 28 days of once a day application.