"Formaldehyde, borax, salicylic acid. Today, these chemicals are used in embalming fluids, cleaning supplies, and acne medications. But in 1900, they were routinely added to food that Americans ate from cans and jars. Often products weren't safe because unregulated, unethical companies added these and other chemicals to trick consumers into buying spoiled food or harmful medicines. Chemist Harvey Washington Wiley recognized these dangers and began...

One hundred years ago, a mysterious and alarming illness spread across America's South, striking tens of thousands of victims. No one knew what caused it or how to treat it. People were left weak, disfigured, insane, and in some cases, dead. Award winning science and history writer Gail Jarrow tracks this disease, commonly known as pellagra, and highlights how doctors, scientists, and public health officials finally defeated it. Illustrated with 100...