Medik8's vitamin C serum recommended for those looking to promote good skin health and a visible radiance boost. With an enhanced level of tetrahexyldecyl ascorbate, a stabilised form of vitamin C, the powerful formula is designed to tackle the visible signs of ageing. Intertwined with vitamin E, these potent antioxidants team up to protect the skin from free radical damage which can lead to premature signs of ageing. Also featuring vitamin F and squalane, the velvety serum nourishes and helps to reinforce the skin's natural protective barrier. Meanwhile, red ginseng helps to boost the serum's brightening powers, resulting in a visibly luminous, evenly-toned complexion. Skin is left with a nourished, smooth-textured and radiant appearance. Proven via independent clinical study on C-Tetra Luxe conducted over 4 weeks on 36 participants. Medik8 recommend a simple anti-ageing strategy with effective, proven results: vitamin C and sunscreen in the morning, vitamin A at night. This strategy is called: CSA.