Gary Michael Null (born in 1945) is an American talk radio host and author on alternative and complementary medicine and nutrition. He owns Gary Null & Associates, a company which markets dietary supplements, as well as a health-food store in New York City. Null has criticized the medical community, promoted a range of alternative cancer treatments and dietary supplements, and questioned the link between HIV and AIDS. He has had a syndicated radio talk show, Natural Living with Gary Null, for more than 27 years. In his book AIDS: A Second Opinion, Null questioned the role of medication for the treatment of AIDS and instead advocated a range of dietary supplements for HIV-positive individuals. His book was criticized as "irresposible" and he was cited as a prominent proponent of AIDS denialism. In 2010, Null reported that he had been poisoned and nearly killed by ingesting one of his own dietary supplements, "Gary Null's Ultimate Power Meal". Null sued a contractor involved in producing the supplement, alleging that it contained more than 1,000 times the dose of vitamin D reported on the label, leading to the hospitalization of Null and six other consumers with vitamin poisoning.