In today’s post, the focus will be on hyaluronic acid (HA) fillers and what differentiates the different products from one another. You may have heard of many names thrown around for HA fillers including Juvederm, Juvederm ultra, Juvederm vollure, Restylane silk, Restylane refyne, Belotero, etc. What is Hyaluronic Acid and How does it Work? Hyaluronic acid (HA) is a type of sugar (polysaccharide) that is present in body tissues, such as the skin and ...