WHAT IS HYALURONIC ACID: Hyaluronic acid is a polymer made up of repeating units of N-acetylglucosamine and glucuronic acid. The glucuronic acid and N-acetylglucosamine that are found within Hyaluronic acid are connected through Beta 1-3 and Beta 1-4 linkages. NATURALLY COMPONENT: Hyaluronic acid is a natural component of the body. It is naturally found in the deeper layers of the skin known as the dermis. GLUTEN-FREE: These tablets are non-GMO and certified gluten-free. They are free of: gluten, wheat, dairy, soy, yeast and sugar. They are also free of artificial flavors, sweetener, preservatives and colors.