Dietary Supplement. Supports Muscular Endurance. Helps Delay Muscle Fatigue*. High Potency. Vegetarian Product Beta-Alanine is a non-essential amino acid that is used by muscle cells to synthesize Carnosine. Carnosine is a dipeptide that functions as a buffer after the hydrogen ions produced during strenuous exercise, thus helping to maintain optimum muscular pH. NOW uses CarnoSyn®, a patented form of beta-alanine that has been clinically tested and shown to increase muscle carnosine content, allowing muscles to work harder and longer during intense exercise. NOW® Beta-Alanine is backed by scientific research demonstrating that Carno.