On Sept. 6, 1958, the “natural” food movement and chemophobia as we know it were born. On that day, the
Food Additives Amendment of 1958, which modified the U.S. Food, Drug, and Cosmetic Act of 1938, came into force.
Also known as the Delaney Clause, it stated if a synthetic chemical could be shown to cause cancer in laboratory animals, the chemical must be banned. It also suggested if the exact same chemical was natural, it was safe. While this was immediately attacked as a baffling and unscientific approach to carcinogenicity, many lawyers were looking forward to decades of litigation.