"The Fasting Cure" by Upton Sinclair is a nonfiction book published in 1911. Drawing from his personal experiments with diet and fasting, Sinclair advocates for periodic fasting as a path to health, making bold claims that it can cure nearly all diseases, from cancer to the common cold. The book sparked controversy among medical professionals who condemned it as unscientific faddism, though it became a bestseller and continues to inspire discussion about fasting's potential benefits. (This is an automatically generated summary.)