William Frank Longgood (September 12, 1917 – August 9, 2000) was an American journalist and writer known for the controversial book Poisons in Your Food.

[3][4] During 1950–1952 a select committee held a series of hearings to investigate the use of "Chemicals in Foods and Cosmetics" which were published by the United States Congress.

[4] The book contains a chapter "Bug Killers in Every Bite" which states that roast beef may contain traces of aldrin, chlordane, DDT, dieldrin, and lindane.

[4][7] Darby commented that the book was written from a non-scientific bias of a natural food-organic cult follower of J. I. Rodale and suggested that it will "no doubt be welcomed by those who believe with him that the public is the victim of a giant conspiracy joined in by the Food and Drug Administration, the American Medical Association, the "big chemical companies" and, apparently, scientists in general– a charge so ridiculous that it serves only to be ignored.

[8] The book was criticized for citing dubious sources such as Royal Lee of Milwaukee who was convicted for fraudulent claims and Adelle Davis.

Environmentalist Dennis Puleston positively reviewed the book in The Quarterly Review of Biology commenting that "among the spate of recent books decrying the environmental deterioration of Planet Earth, this work stands out from the rest as the most comprehensive and well-documented indictment of man's treatment of his natural world.