So I've been using a bunch of different Hyaluronic Acids on my face over the past few months and have found it improves my skin.. The Divas Never Age brand is a good one. It's not oily at all and it comes in a nice bottle. The smell is fine - some smell kind of stinky. So HOW exactly does this work? WebMd puts it like this: Hyaluronic acid is a substance that is naturally present in the human body. It is found in the highest concentrations in fluids in the eyes and joints. The hyaluronic acid that is used as medicine is extracted from rooster combs or made by bacteria in the laboratory. People take hyaluronic acid for various joint disorders, including osteoarthritis. It can be taken by mouth or injected into the affected joint by a healthcare professional. The FDA has approved the use of hyaluronic acid during certain eye surgeries including cataract removal, corneal transplantation, and repair of a detached retina and other eye injuries. It is injected into the eye during the procedure to help replace natural fluids. Hyaluronic acid is also used as a lip filler in plastic surgery. Some people apply hyaluronic acid to the skin for healing wounds, burns, skin ulcers, and as a moisturizer. I received this product at a promotional price in exchange for my honest review. This is no way affected my actual opinion on the product.