If you're looking for the OG of the hyaluronic movement - then this is it! One of the first skincare brands to sell a serum that shouted about the fact it contained hyaluronic acid, The Ordinary Hyaluronic Acid 2% + B5 (£6) is one I always recommend to those looking to try and add HA into their routine but aren't ready to commit to investing in a premium product. It also contains anti-inflammatory vitamin B5 that draws moisture from outside into the skin for an added boost of hydration.