RRP £85 - Lightweight, fast-absorbing serum - Powerful antioxidant - Helps prevent premature signs of aging - Suitable for sensitive skin PREVENT SkinCeuticals Serum 10 Ideal for sensitive skin types or conditions to help restore healthy-looking skin, Serum 10 neutralizes free radicals, defends against environmental damage, and helps prevent premature signs of aging. Now formulated with AOX+ advanced antioxidant technology, this lightweight, fast-absorbing serum combines ferulic acid with 10% pure vitamin C to enhance antioxidant performance. Alternatively, there is also the cult, award-winning anti-oxidant SkinCeuticals C E Ferulic.Benefits:- A powerful antioxidant that reduces the appearance of fine lines and wrinkles - Neutralizes free radicals, provides photoprotection, and stimulates collagen synthesis- Proven delivery of L-ascorbic acid to the skin in concentrations proven to be effective- Once absorbed, can’t be washed or rubbed offDirections:   Best suited for sensitive skin & new AOX users. Once in the morning after cleansing, apply 4-5 drops to a dry face, neck, and chest. Follow with a moisturiser and sunblock. Once opened use within 6 months.Size: 30ml   Serum 20% no longer available - Tests have shown that 10% L -ascorbic acid can provide the same results as serum 20%.Serum 20% was launched in 1999 because tests showed that 20% L ascorbic acid provides skin with the maximum one-time application concentration. The reservoir effect of L ascorbic acid means that an application of a 10% L ascorbic acid saturates the skin within 3 days offering the exact protection and benefits as serum 10%.