Hyaluronic acid is one of the most stable active ingredients and I've recently added it to my skincare routine. I’ve started using the L'Oreal Paris Revitalift Hyaluronic Acid Serum and you can see the results in these pictures. This serum is worth every penny. It’s super hydrating, non sticky and lightweight, and has micro hyaluronic acid for deeper penetration. My face has become so radiant, you can see how it’s GLOWINN! I recommend you add this one to your skincare.