1 / 8

Best hyaluronic acid serum: Medik8 Hydr8 B5

This lightweight gel-serum is packed with hyaluronic acid and vitamin B5, so it not only provides an instant boost to your skin's hydration levels, but it also improves your moisture-retention levels over time. One of the best hyaluronic acid serums out there, hence the higher price point.

Buy now Medik8.com, £40