Medik8 Clarity Peptides 10% Niacinamide-Infused Peptide Serum (£40) will help to reduce red, blotchy, and breakout-prone skin. Thanks to the crystalide peptide and combination of 10 percent niacinamide and zinc PCA, this lightweight serum combats breakouts and hyperpigmentation, all while leaving your skin feeling super smooth and glowing.