SR CarnoSyn® sustained release beta-alanine is a superior delivery system of CarnoSyn® beta-alanine. Muscle cells can only absorb a fixed amount of beta-alanine in a short period; thus, when taking instant release beta-alanine the remaining beta-alanine is metabolized and/or excreted from the body. SR CarnoSyn® prolongs the supply of beta-alanine, therefore maximizing absorption and retention in muscle tissue, and it enables higher dosing with minimal to no paresthesia, improving peak performance.