Black Walnut Hull
herbs
Black walnut hull is the outer covering of black walnuts, traditionally used in herbal medicine for its antimicrobial and antiparasitic properties. Rich in juglone and tannins, it has been employed historically to support digestive health and address parasitic concerns. Modern research remains limited but suggests potential benefits for gut health and immune support.
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Benefits
Dosage
Typical Dose
500–1000 mg daily
Upper Limit
2000 mg daily
Timing
With meals to minimise gastrointestinal upset
Forms & Bioavailability
Dried powder
Moderate
Liquid extract/tincture
High
Capsules
Moderate
Side Effects
Interactions
Research Summary
Clinical evidence for black walnut hull remains limited, with most studies conducted in vitro or on animal models. Some research supports antimicrobial activity against common pathogens, though human efficacy studies are lacking. Further investigation is needed to establish optimal dosing and long-term safety profiles.
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The Bottom Line on Black Walnut Hull
Black Walnut Hull is moderately researched with promising but sometimes mixed evidence.It is most commonly used for antimicrobial and antiparasitic properties and supports digestive health and regularity. As with any supplement, individual results vary. Start with the lower end of the dosage range and assess for 4-8 weeks before adjusting.
About Our Research
This profile is compiled from peer-reviewed research published on PubMed, the NIH Office of Dietary Supplements, and established nutritional science databases. Dosages reflect clinically-studied amounts from human trials where available. We update profiles as new research emerges. This is not medical advice — consult a healthcare professional before supplementing.
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Goal Guides for Black Walnut Hull
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