Last verified: today
Black Walnut Hull
Also known as: Juglans nigra, Black Walnut Husk, Eastern Black Walnut
Evidence under review. — Not yet rated
Traditional herbal remedy used for parasites and gut health, but lacks clinical trial evidence.
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What it does
Black Walnut Hull is the outer green casing of the black walnut (Juglans nigra). It contains juglone, tannins, and iodine, compounds that have shown antimicrobial and antiparasitic properties in...
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Evidence quality
Evidence base hasn't been formally rated yet. See research below.
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Clinical dose
No established dose
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Found in
What the Science Says
Black Walnut Hull is the outer green casing of the black walnut (Juglans nigra). It contains juglone, tannins, and iodine, compounds that have shown antimicrobial and antiparasitic properties in laboratory settings. It has a long history of traditional use for intestinal parasites, fungal infections, and digestive complaints, but no clinical trials have confirmed these effects in humans.
What It Doesn't Do
Not proven to eliminate parasites in humans — lab results don't equal clinical results. No evidence it detoxifies the body in any meaningful way. Won't treat candida overgrowth based on current human data. Not a substitute for prescribed antiparasitic medications.
Evidence-Based Benefits
Contains juglone and tannins that show antimicrobial effects in laboratory studies.
Weak EvidenceEffective at: No established dose
Traditionally used to support removal of intestinal parasites, though human trial evidence is absent.
Weak EvidenceEffective at: No established dose
Absorption & Bioavailability
Unknown — no human pharmacokinetic studies available from the provided data.
Red Flags to Watch For
- Juglone, the active compound, is toxic to some plants and animals — long-term human safety data is lacking
- May interact with certain medications, including blood thinners, due to tannin content
- Commonly sold in 'parasite cleanse' products with exaggerated or unproven claims
- No standardized dosing exists — product potency varies widely between brands
- High tannin content may irritate the digestive tract or reduce absorption of nutrients and medications
Products Containing Black Walnut Hull
See how Black Walnut Hull is used in these analyzed products:
Frequently Asked Questions
What does Black Walnut Hull do?
Traditional herbal remedy used for parasites and gut health, but lacks clinical trial evidence.
What is the effective dose of Black Walnut Hull?
No established dose
Is Black Walnut Hull safe?
Juglone, the active compound, is toxic to some plants and animals — long-term human safety data is lacking
What doesn't Black Walnut Hull do?
Not proven to eliminate parasites in humans — lab results don't equal clinical results.
Research Sources
- General knowledge — Limited published research available
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-06-03