Natural Alternatives International, Inc. formulates, manufactures, and markets nutritional supplements in the United States and internationally. It operates through two segments: Private-Label Contract Manufacturing, and Patent and Trademark Licensing. The company provides private-label contract manufacturing for vitamins, minerals, herbal and other nutritional supplements, as well as strategic partnering services such as customized product formulation, clinical study design, regulatory compliance, and packaging design. It also sells beta-alanine under the CarnoSyn, TriBsyn, and SR CarnoSyn names. Founded in 1980, it is headquartered in Carlsbad, California.