Nature's Best Perfect Branched Chain Amino Acid capsules are formulated with your health in mind. All Nature's Best products are manufactured from the highest quality raw materials, under strict supervision and in accordance with Good Manufacturing Practices. Extensive quality control procedures ensure proper purity, dissolution and potency. Nature's Best products are specially packaged to protect nutrients from the effects of moisture, light and air. The Branched Chain Amino Acids: leucine, isoleucine and valine. A perfectly balanced blend of these most important amino acids for growth and accelerated muscle repair.