Disputed

Did Pythagoras Really Compare Eating Beans to Cannibalism?

The ancient mathematician's bizarre dietary prohibition has puzzled scholars for millennia

Eating beans is the same as eating the heads of one's parents.

— Attributed to Pythagoras (Pythagorean theorem, mathematics)

Alleged date: c. 570-495 BCE (attributed later)

Another extreme reason attributed for the bean prohibition.

The Verdict: Disputed — The Source Is Uncertain

The Pythagorean prohibition on beans is one of history's most famous dietary rules, but this specific extreme formulation comes from writers centuries after Pythagoras lived. None of his own writings survive.

Database Verification Note

Found in 1 providers: gemini

1 source cross-referenced

The Real Story

Pythagoras left no written works -- everything we know about his teachings comes from followers and later writers, some writing centuries after his death around 495 BCE. The bean prohibition is mentioned by multiple ancient sources (Aristotle, Diogenes Laertius, Plutarch) but each gives different reasons. Some say Pythagoras believed beans contained the souls of the dead. Others cite their resemblance to human embryos. The 'eating your parents' heads' version comes from Diogenes Laertius, writing roughly 700 years after Pythagoras lived. Modern scholars have proposed more practical explanations: favism (a genetic enzyme deficiency common in the Mediterranean that makes fava beans toxic), or the fact that beans cause flatulence which disrupted meditation. The truth is we simply cannot know what Pythagoras actually said about beans, if anything specific at all.