Herbs Hub
Pumpkin seeds, Cucurbita pepo. Botanical plate: Coloquinte plate rayée Vilmorin-Andrieux 1883
Plate: Coloquinte plate rayée Vilmorin-Andrieux 1883. Vilmorin-Andrieux & Cie. Public domain.

Pumpkin seeds

Cucurbita pepo · 南瓜子

Seeds & Grains. Native American, Modern nutrition and Chinese Medicine.

Also called Pepitas, Squash seeds, Nan gua zi

Pinyin: Nán Guā Zǐ

Spanish: Pepita (semilla de calabaza)

Green hulled seeds of pumpkin and squash, eaten as snacks and rich in magnesium, zinc and iron.

Did you know? Squash and pumpkins were among the first plants domesticated in the Americas, about 10,000 years ago.

What it may help, and how strong the proof is

  • Men's health. Some small trials of pumpkin seed oil show better urinary symptoms in men with an enlarged prostate. Results are small and mixed.
    Early proof
  • Parasites & worms. Used in folk and Chinese medicine for tapeworm. A seed compound called cucurbitin was tested in a few older human studies. Proof is limited.
    Traditional proof

Parts of the body

Gut & intestines, Hormones & reproduction

Traditional use

Native American peoples ate pumpkin seeds and used them in folk care to expel worms. In Chinese medicine, nan gua zi is used to expel intestinal worms, mainly tapeworm.

How it is classified

Herbal actions
Anti-parasite, Nutritive. Energy: neutral.
Chinese medicine
南瓜子 Expel parasites. Nature: neutral. Flavour: sweet. Enters the Stomach and Large Intestine channels.

How people take it

Eat a small handful, about 1 ounce (28 grams), as a snack. Prostate trials used pumpkin seed oil daily for months, and doses varied.

Food and oil.

Where to get it

Grown in warm regions worldwide. Sold raw, roasted, salted, shelled and as oil. Pumpkin seed oil is a dark, nutty oil.

Be careful

Safe as food, but salted and roasted seeds are high in sodium and calories, and large amounts may upset the stomach. Pumpkin seed is not a proven treatment for worms, so see a doctor for a worm infection.

Mixing with other things

  • Works well together

    Pumpkin seeds are a food source of zinc and magnesium.

The honest take

Pumpkin seeds are a healthy snack. The worm and prostate claims rest on old folk use and small, mixed trials. Seed oil for urinary symptoms is the best studied use.