Hyaluronic acid is the key to hydrated skin, but you need to use it correctly. Here, see everything you need to know – and the best serums to invest in.

While it doesn't have the same quenching effect that comes with a more watery formula, like my Nivea Cellular Filler Hyaluronic Acid Serum and Tropic Rainforest Dew favourites, I found that the milky ...