Medik8 serums are where the brand's targeted, ingredient-led approach really comes into its own. From vitamin A and vitamin C to peptides and other treatment-focused formulas, there is a serum for almost every stage of a considered routine. Start with vitamin A, vitamin C or peptides, depending on your priorities, then follow with your usual moisturiser and SPF. For a wider introduction to the brand and its routine philosophy, read our guide to Medik8.