The Glow Hub Hydration Hero Serum (£14) went viral on TikTok after skinfluencer Amelia Olivia dubbed it the "GOAT of Hyaluronic Acids". But what actually makes it one of greatest of all time? Well, the formula is packed full of three different types of HA which hydrate each and every layer to create a weightless film across the upper layer of the skin and lock in four times more moisture to leave you with glowing, deeply moisturised skin.