How to Be Thin

Ever wanted to achieve the perfect figure by willingly swallowing a "sanitized" parasite or replacing your meals with a daily dose of arsenic?

Welcome to the 19th and early 20th-century diet craze, an era when the world's leading medical experts promised absolute, guaranteed weight-loss miracles-provided your metabolism (and your liver) survived the treatment.

In How to Be Thin (and Survive the Science), author William Hathorne dives into the wildly unregulated, lucrative, and astonishingly dangerous history of historical weight-loss advice. Drawn directly from genuine dietary manuals, patent medicine advertisements, and scientific lectures published between 1816 and 1930, this darkly comedic history reveals exactly what our ancestors endured in the pursuit of the "new man" or "new woman."

Part of the Historically Bad Advice series, this book pairs jaw-dropping historical source material with biting satirical commentary. You'll discover how celebrated authorities repeatedly declared the complex mystery of human metabolism definitively "solved," only to invent an entirely contradictory, equally hazardous diet a decade later.

Inside, you will learn:

• The Tapeworm Diet: Why ingesting a "sanitized" parasite in pill form was marketed as the ultimate, hands-free weight-loss solution for the dedicated socialite.

• Arsenic and "Miracles": The horrifying reality behind Victorian patent medicines that promised a slimmer figure using chemical cocktails of heavy metals and toxins.

• The Moral Appetite: How 19th-century doctors convinced patients that a robust appetite wasn't just biology, but a profound moral failing that required "governing by force."

• The Chewing Crusades: The agonizing fad of "Fletcherizing" your food, where achieving health meant chewing every single bite hundreds of times until it became a sad, flavorless liquid.

• The Illusion of Certainty: How the diet industry was built on a foundation of absolute confidence, shifting blame entirely onto the patient when the "foolproof" science inevitably failed.

Perfect for fans of dark history, medical oddities, and anyone who has ever suspected that the diet industry is making it up as they go. How to Be Thin is a hilarious, jaw-dropping reminder that while the calorie-counting apps are new, the absurdity of the weight-loss business is centuries old.