Boost your skin's radiance each morning with Medik8's C-Tetra Luxe - clinically proven to reduce the appearance of wrinkles and hyperpigmentation in just 4 weeks. Working to boost visible radiance and support your skin barrier, C-Tetra Luxe features twice the amount of vitamin C (14%) compared to Medik8's original C-Tetra serum. Formulated with a stabilised and potent form of vitamin C (tetrahexyldecyl ascorbate), C-Tetra Luxe gives the skin a healthy glow after just 1 use; all while providing the skin with a gentle, nourishing experience. Lightweight and velvety-soft in texture, 81% reported C-Tetra Luxe was the best vitamin C serum they had ever used. This is the ideal vitamin C serum for those looking for enhanced skin radiance and antioxidant protection alongside deep nourishment. *Proven via independent clinical study on C-Tetra Luxe conducted over 4 weeks on 36 participants Key Benefits: Instant Skin Youthfulness: Enhanced with optimised red ginseng for proven youth-boosting power and visibly brighter, more youthful-looking skin in 1 hour. Dark Spot Reduction: Delivers potent, clinically proven action on the appearance of dark spots. 81% agree visible hyperpigmentation had reduced in just 4 weeks. Total Skin Nourishment: The addition of vitamin F and squalane provides deep moisturisation and clinically proven skin barrier support. 94% noticed smoother and softer skin after just 1 use. Proven Results: 1 hour to visibly brighter, more youthful-looking skin* 7 days to improved skin radiance* 81% agree visible hyperpigmentation had reduced in just 4 weeks* 94% noticed smoother and softer skin after just 1 use* 86% reported it was the best vitamin C serum they had ever used* Key Ingredients: Stabilised Vitamin C (tetrahexyldecyl ascorbate): This stable, low-irritation form of vitamin C is incredibly effective on the skin; delivering exceptional protection against ageing free radicals. Supporting collagen production and brightening the skin tone, it leaves the complexion visibly more even, radiant and youthful-looking. Squalane: A near skin-identical lipid that helps to support the skin's natural barrier for a nourished complexion. Maracuja Oil: Rich in fatty acids and nutrients, maracuja oil provides your skin with antioxidant protection against free radical damage, while deeply nourishing your complexion. Optimised Red Ginseng: Stimulates collagen production and boosts the serum's brightening powers for youthful-looking skin. Vitamin E: Rich in antioxidants, vitamin E helps to protect the skin against ageing free radicals. It also helps to boost the power of vitamin C for maximum visible results. Good to Know: DERMATOLOGICALLY TESTED CLINICALLY PROVEN FORMULA NO ARTIFICIAL FRAGRANCE NO SYNTHETIC COLOURS PARABEN FREE ALCOHOL FREE CERTIFIED BY THE VEGAN SOCIETY