Bioavailable Clinically Documented Naturally Derived Skin Hydration Hyabest Gluten Free Vegan Hyaluronic Acid provides the fluid matrix for joint lubrication, skin hydration and skin repair. Jarrow Formulas Hyaluronic Acid is a low-molecular weight preparation derived from biological fermentation. It is clinically documented to be bioavailable and to improve hydration of the skin. For best results use with Jarrow Formulas JarroSil, the biologically Activated Silicon.