Best Vitamin C Brightening Serum Tatcha Violet-C Brightening Serum (£86) This is the ultimate in brightening formulas, with 20 percent vitamin C and 10 percent exfoliating AHAs. This removes any dead skin cells, whilst promoting cell turnover to reveal silky, smooth skin. Image Source: Tatcha Tatcha Violet-C Brightening Serum £86 from tatcha.co.uk Buy Now