"I began using it nightly and this serum is INCREDIBLE. It has made a huge difference in the quality and brightness of my skin." Kim M. | Pure Hyaluronic Acid Serum Ingredients: Purified Water, Hyaluronic Acid (Vegan/Gluten Free), Phenoxyethanol (<1%). That's it, period. Plumps fine lines and super hydrates skin. Truly all natural...and simply works.