Hi-yal-you-ron-ic. Say it slow. Say it fast. Say it fast three times. One of the best products in the market for plump, dewy, healthy skin - Hyaluronic acid has very quickly become a part of a large majority's skincare routine. It binds itself to collagen in the skin and creates a barrier to retain water on one side to make the skin look and feel hydrated. A very important product for those in dry and harsh climates to help protect and hydrate the skin better.
Best used after Vitamin C in the morning - although give your skin a few minutes to absorb the Vitamin C before going in with the Hyaluronic acid to avoid pilling.