ProPhase Labs, Inc. engages in the development and commercialization of novel drugs, dietary supplements, and compounds in the United States. The company operates in two segments, Diagnostic Services and Consumer Products. It provides a range of OTC dietary supplements, including Legendz XL for male sexual health; and Triple Edge XL, an energy and stamina booster. The company also offers contract manufacturing services, such as consumer product development, pre-commercialization, production, warehousing, and distribution; COVID-19 diagnostic information services to a range of customers, including health plans, third party payers, and government organizations; and respiratory pathogen panel molecular testing services, as well as personal genomics products and services. In addition, it is involved in the research, development, manufacture, distribution, marketing, and sale of over the counter (OTC) consumer healthcare products and dietary supplements; and retail operations. The company was formerly known as The Quigley Corporation. ProPhase Labs, Inc. was founded in 1989 and is headquartered in Garden City, New York.