was a Canadian naturopath, author, and controversial figure in alternative medicine, best known for her claims that all human diseases are caused by parasites and environmental pollutants. Core Philosophy and Claims

She claimed that by removing these toxins and killing the parasites, any disease could be cured.

She argued that toxins such as solvents, heavy metals, and chemicals "triggered" these parasites to cause disease.

Using specific combinations of black walnut hulls, wormwood, and cloves to eliminate parasites.

Clark is famous for inventing the , a hand-held electronic device that she claimed could kill parasites, bacteria, and viruses by delivering a low-voltage, high-frequency current through the body. Her protocols typically involved: The Zapper: Daily use to "electrocute" pathogens.

Specifically, she claimed a rare fluke ( Fasciolopsis buski ) was the primary cause of cancer.

Despite the lack of scientific validation and intense criticism from medical watchdog groups like Quackwatch , Clark maintained a loyal following. Products based on her designs continue to be sold through independent retailers, such as the Dr. Clark Store , which was carried on by her family and associates after her death from multiple myeloma in 2009. Dr. Clark Store, Inc OFFERING STATEMENT - SEC.gov

The Federal Trade Commission (FTC) took action against various companies marketing "Zappers" for making unsubstantiated medical claims. Legacy