Billion-dollar drugs have been pulled from the market for less carcinogenic contamination than is found in a single serving of grilled chicken. In 2018, one of the bestselling blood pressure drugs, valsartan—sold as Diovan—was found to be contaminated by the “probably carcinogenic” nitrosamine known as N-nitrosodimethylamine (NDMA). It’s believed that about 20 million people worldwide were prescribed the drug tainted with this contaminant, which has a cancer risk shown to exceed that of many known potent carcinogens, such as asbestos, PCBs, and benzo[a]pyrene. As I discuss in my video Cancer-C...