Black walnut hull
Juglans nigra
Herbs & Roots. Native American and Western & European.
Also called Eastern black walnut, American black walnut
Spanish: Nogal negro
Unproven; juglone can irritateThe green outer husk of black walnut, used in folk remedies for worms and skin problems.
Did you know? Black walnut trees release juglone, a chemical that can stunt or kill tomatoes and other plants grown nearby.
What it may help, and how strong the proof is
- Parasites & worms. Traditional worm remedy. No good human trials were found.Traditional proof
- Skin. Used on fungal rashes and warts in folk medicine. Little proof exists.Traditional proof
- Cleansing & detox. Sold in detox and cleanse kits. No evidence supports these claims.Not supported
Parts of the body
Traditional use
Native American and early American healers used the hull for worms, skin infections, and warts. The use has been passed down in folk remedies for generations.
How it is classified
- Herbal actions
- Anti-parasite, Astringent, Antifungal. Energy: neutral.
How people take it
No trial-based doses exist, and products vary widely in strength. Use it only with a clinician's agreement, and avoid long-term use.
Tincture, capsule and powder.
Where to get it
Grows in eastern and central North America and is grown for timber. Sold as hull powder, tinctures, and capsules. Strength varies because the hulls come from many different trees.
Be careful
Juglone can irritate the skin and gut and may cause allergic reactions. Large or long use may cause harm. Avoid it in pregnancy and in children, and avoid it if you are allergic to walnuts.
Avoid if: pregnancy; children under 12; walnut allergy.
Mixing with other things
No specific mixing notes on file. That doesn't prove it's safe with everything; ask a pharmacist about your full list.
The honest take
Nothing here shows black walnut hull is safe or helpful against parasites in people. Its main chemical, juglone, can irritate the body and harm plants. Cleanse and detox products built on it have no evidence behind them.