Vitamin A (Beta Carotene). Protien Powder. Beta-Alanine is a non-essential amino acid that is used by muscle cells to synthesize Carnosine. Carnosine is a dipeptide (Beta-Alanine plus Histidine) that functions as a buffer for the hydrogen ions (acid) 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.