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Black walnut for Digestion

Juglans nigra

Black walnut has been traditionally used in North American herbalism to support digestive health, particularly for intestinal parasites. A decoction of the hulls is commonly prepared and taken as an adjunct remedy. Evidence rated moderate (d = 0.30).

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Juglans nigra (Black walnut) — botanical photograph
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How it works mechanism

The active compounds juglone and tannins are thought to have anthelmintic properties, disrupting the metabolism of parasitic worms in the gut. However, the exact mechanism is not fully characterised.
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Frequently asked

Is Black walnut effective for Digestion?

Black walnut has been traditionally used in North American herbalism to support digestive health, particularly for intestinal parasites. A decoction of the hulls is commonly prepared and taken as an adjunct remedy. Evidence is rated moderate with an effect size of d=0.30. See the Evidence section above for cited sources.

How does Black walnut compare to other plants for Digestion?

See the alternatives section above — we list other species with documented effects on Digestion, ranked by evidence quality.

Is this medical advice?

No. This is educational reference. Always consult a healthcare professional before using any herbal preparation, especially alongside prescription medication.

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