Dehydration

When your skin feels parched or dehydrated, drench it in a serum loaded with hyaluronic acid. Purito Dermaha-3 Serum, £19.70, lookfantastic.com, contains three different molecular weights of hyaluronic acid to target dehydration deep down. Apply it immediately after cleansing (when the skin is still damp) to give an added boost of moisture.