Now Sports 100% Pure Beta Alanine Supplement Powder contains CarnoSyn®, a unique type of beta-alanine that has been clinically evaluated and shown to boost muscle carnosine content, allowing muscles to operate harder and longer during strenuous exercise. NOW® Sports Beta-Alanine is supported by scientific studies indicating that CarnoSyn® supplementation causes delayed muscle exhaustion and speedy recovery time, allowing you to achieve your strength and endurance training goals. Beta-alanine is not a necessary amino acid. This suggests the body can generate it on its own. However, you can still improve your performance by taking beta alanine supplements. After absorption, beta alanine in the muscles promotes the formation of a chemical known as carnosine, which affects fatigue resistance. Carnosine is a dipeptide (beta-alanine + histidine) that acts as a buffer for hydrogen ions (acids) produced during hard activity, assisting in the maintenance of an optimal muscle pH.