The Révive Clarté Vitamin C Brightening Serum (£225, originally £250) is basically two serums in one sleek tube. Whilst you can't see it from the outside, inside the tube are two chambers, one that contains the L-ascorbic acid, ensuring it stays fresh and doesn't degrade over time, and the other contains a moisturising formula that contains hyaluronic acid, thermal water, biomimetic proteins, and antioxidants. With repeated use it can help fade dark spots, smooth fine lines, and overall make skin result is brighter, plumper, or more radiant.