Natural Alternatives International, Inc. engages in formulating, manufacturing, and marketing nutritional supplements in the United States and internationally. It operates through two segments: Private-Label Contract Manufacturing, and Patent and Trademark Licensing. The company offers private-label contract manufacturing services to companies that market and distribute vitamins, minerals, herbal, and other nutritional supplements, as well as other health care products. It also provides strategic partnering services, such as customized product formulation, clinical study design and support, manufacturing, marketing support, international regulatory and label law compliance, international product registration, packaging in multiple formats and labeling design, scientific research, proprietary ingredients, customer-specific nutritional product formulation, product testing and evaluation, marketing management, packaging and delivery system design, regulatory review, and international product registration assistance.In addition, the company sells beta-alanine ingredient under the CarnoSyn, TriBsynm, and SR CarnoSyn names. The company manufactures products in various forms, including capsules, tablets, chewable wafers, and powders. Its private-label contract manufacturing customers include companies that market nutritional supplements through direct sales marketing channels, direct to consumer e-commerce channels, and retail stores. Natural Alternatives International, Inc. was founded in 1980 and is headquartered in Carlsbad, California.