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.Please note: Product packaging shown may be different to the product received due to regional variations.