Doctor?s Best Stabilized R-Lipoic Acid contains BioEnhanced? Na-RALA the sodium salt of R-Lipoic acid (RLA). BioEnhanced? Na-RALA is in its natural and stabilized form of RLA that won?t degrade at high temperatures and is more bioavailable and biologically active.* Lipoic acid (LA) plays an important role in glucose metabolism and energy production. LA is both fat and water soluble. Studies suggests that LA may support the body?s antioxidant defenses.* D-Biotin is an integral part of enzyme activity necessary for the breakdown and conversion of fatty acids and carbohydrates into energy. At Doctor?s Best we lead with science. Our products are backed by research and crafted using pure ingredients carefully sourced from around the globe. Since 1990 we have dedicated ourselves to providing highly effective nutritional supplements that enable you to live a healthier lifestyle. We want nothing more than to see you and your family thrive!