Due to legal pressure in the United States, she operated the Century Nutrition clinic in Tijuana, Mexico , where she provided alternative cancer treatments beyond the reach of U.S. authorities.
Clark’s central thesis, popularized in her book "The Cure for All Diseases," was that every illness—ranging from diabetes and AIDS to cancer—stemmed from two factors:
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 HULDA CLARK
The Federal Trade Commission (FTC) took action against various companies marketing "Zappers" for making unsubstantiated medical claims. Legacy
She argued that toxins such as solvents, heavy metals, and chemicals "triggered" these parasites to cause disease. Due to legal pressure in the United States,
Clark’s work was widely rejected by the scientific and medical communities, who found no clinical evidence to support her claims. Her career was marked by significant legal challenges:
Specifically, she claimed a rare fluke ( Fasciolopsis buski ) was the primary cause of cancer. Products based on her designs continue to be
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.