Powered by gentle yet effective 20% vitamin C, the Medik8 C-Tetra Advanced is a lightweight gel-serum that visibly brightens and smooths, protecting against the premature signs of ageing. Paired with phyto exosomes, messenger molecules that provide an optimal delivery of actives, the formula absorbs with a fast-acting result. Omni-antioxidant acetyl zingerone supports the serum, lending powerful defence from dulling pollution and aggressors, leaving a more radiant, refreshed finish. Meanwhile, its lightweight, hydrating consistency nourishes the skin barrier with each application to deliver instant luminosity. Clinical Results: 7 days to visibly brighter skin* 7 days to visibly reduced wrinkles* 0% barrier disruption* 7 days to visibly smoother skin texture* *Proven via independent clinical study conducted over 4 weeks on 32 participants.