Gary Michael Null (born January 6, 1945) is an American talk radio host and author who advocates for pseudoscientific alternative medicine and produces a line of questionable dietary supplements.
He is also faculty at Fairleigh Dickinson University.Null is hostile to evidence-based medicine and has accused the medical community of being in a cabal with the pharmaceutical industry to suppress novel treatments for economic gains.
He has promoted a range of pseudo-scientific and ineffective alternative treatments, including ones for cancer.He is also a prominent HIV/AIDS denialist who believes nutritional deficiencies are the causative agents of all illneses, and has accordingly promoted fringe, diet-based treatment regimes for curing AIDS and other illnesses.
Null holds strong anti-vaccination views and rejects the scientific consensus on topics such as water fluoridation, genetically modified organisms, and food irradiation.Reactions in the popular press and scholarly community to Null's claims have been generally negative, and Null along with his publications have been frequently criticized for disseminating misleading information which can negatively affect the public's understanding of health issues, and Quackwatch has described Null as "one of the nation's leading promoters of dubious treatment for serious disease".