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Swallowed watermelon seeds will grow a watermelon in your stomach

From bullshitopedia
Swallowed watermelon seeds will grow a watermelon in your stomach
FALSE
"If you swallow watermelon seeds, a watermelon will start growing in your stomach."
Domain Food, Nutrition & Wellness
Tactic Fabrication
Era Historical
First seen 20th century
Origin Teasing among children and adults, especially at summer picnics
Last reviewed 2026-10-30
Further reading: books on Food, Nutrition & Wellness

Many children have been told, usually as a joke, that swallowing a watermelon seed will make a watermelon grow inside them. Some young children take it seriously and become frightened.

What the evidence shows

  • No growing conditions. Seeds need soil, light and the right conditions to sprout. The stomach's acid and the digestive process do not allow a seed to germinate.
  • What happens. Swallowed seeds are either broken down or pass through the digestive system.
  • Safe to eat. Watermelon seeds are edible and are sold roasted as a snack in many countries.

Why it matters

It is a gentle joke for most children, but very young children can take such stories literally. It is a good example to use when teaching children to ask "how would that work?"

Sources

  • Cleveland Clinic, "Is It Safe to Eat Watermelon Seeds?"
  • Library of Congress, "Everyday Mysteries," fun science facts.
  • Healthline, "Watermelon Seeds: Nutrition and Benefits."