ProPhase Labs, Inc. engages in the research, development, manufacture, distribution, marketing, and sale of over-the-counter(OTC) consumer healthcare products, dietary supplements, and other remedies in the United States. The company offers TK Supplements product line, including Legendz XL for sexual health; Triple Edge XL, an energy booster and testosterone support; and Super ProstaFlow+ a supplement to support prostate and urinary health. In addition, the company provides contract manufacturing services for OTC healthcare and dietary supplements products. It markets its products through national chain, regional, specialty, and local retail stores. The company was formerly known as The Quigley Corporation. ProPhase Labs, Inc. was founded in 1989 and is headquartered in Doylestown, Pennsylvania.