Bio Response is a line of anti-aging skin products that contain synthetic peptides which mimic the protein found in the temple vipers venom. A key ingredient to help relax the muscular contractions that lead to expression lines. Each Bio response formula is enhanced with the regenerating properties of retinol and the finest botanicals to help hydrate and smooth aging skin for a healthier, younger appearance. This serum is ideal for when your skin needs extra care, lifting and hydration. Manufacturer Date: 7 of October, 2013 General shelf life: 36 months OK Valid at least for the next 9 months GRAB THEM BEFORE THEIR GONE!