Hyaluronic acid: Hyaluronic acid is one of the most effective ingredients for skin hydration as it has the ability to retain up to 10 times its own weight in water. Hyaluronic acid makes the skin hydrated, smooth and plump. Hyaluronic acid is naturally present in the skin, so it helps to maintain the skin’s natural moisture balance. All skin types, from oily to sensitive, can benefit from moisturising. Hyaluronic acid is not an exfoliating acid, despite its name, so you can safely use it in your skincare routine every morning and evening. Hyaluronic acid has a larger molecular size, so it acts on the surface layers of the skin. It forms a moisturising film on the surface of the skin, from which moisture is released throughout the day.