If you find that your skin is feeling dry or that you need a little extra hydration, it is fine to add Hyaluronic Acid on top of your skincare routine. You can introduce it either in the morning or evening (or both if your skin needs it!) before you moisturise.
Our medical team recommends this one from The Ordinary: https://theordinary.com/en-au/hyaluronic-acid-2-b5-serum-100425.html