Go Big Read 2019 - The Poison Squad
By the end of nineteenth century, food was dangerous. Lethal, even.
"Milk" might contain formaldehyde, most often used to embalm corpses. Decaying meat was preserved with salicylic acid and borax. This was not by accident; food manufacturers embraced industrial chemistry, and were knowingly selling harmful products. Unchecked by government regulation, basic safety, or even labeling requirements, they put profit before the health of their customers.