Know your ingredients

Look out for niacinamide and salicylic acid – they’re brilliant at keeping spots at bay. Serums can have the biggest impact on problem skin. La Rocheposay Effaclar Duo Serum, £32, Boots, is one of the best we’ve tried. Glossier Super Pure, £25, glossier. com, is also fantastic. Use after cleansing, before moisturiser.