Best Soaking Serum

SkinCeuticals HA Intensifier Serum, €91, for stockists, see skinceuticals.co.uk

Now that you’ve got your head around the basics of hyaluronic acid, let me tell you that there are three types of it in this serum. As a trio, they promise that you get a super-boosted dose of skin strengthening and cell-plumping. It also contains licorice root, which claims to help hold the hyaluronic acid in your skin. “This is a lovely serum for summer,” one panellist said. “It’s light and fresh-feeling, and it made my skin seem less parched.”