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About Black Walnut
Plant: Juglans nigra
Contains juglone, a compound with antiparasitic and antimicrobial action.
Reference dosing
| Dosing | No specific dose is given in the main source material. |
| Tincture dose — Napiers 1:3 | Up to 5ml, 3 times daily |
| Capsule dose (mg) | No capsule mg dose is documented in the source material for this herb. |
Taken from the Napiers Black Walnut Tincture label (1:3, 45% alcohol). This is the shop's stated maximum, not a figure from the main source material. Follow the product label or your practitioner.
Capsule whole-herb extracts vary by manufacturer (a concentrated extract needs less than a plain powder). Treat these figures as a guide only and follow the product label.
These are figures from the sources used on this site. They are not a prescription. Follow the product label and your prescriber.
Safety and cautions
Contraindications: Avoid in pregnancy and breastfeeding: black walnut preparations are advised against because mutagenic properties have been documented (Drugs.com Natural Products). Do not use if you have a tree nut allergy; walnut allergy can cause severe reactions. It contains juglone, which is toxic to animals, and higher doses may act as a laxative. It is high in oxalate (kidney stones) and may reduce iron absorption. Safety data are limited. Always check with your prescriber or pharmacist, especially if you take blood thinners or other regular medicines.
Herbs can interact with prescription medicines and other supplements. Check with your prescriber or pharmacist first, and do not use herbs in pregnancy or while breastfeeding unless a doctor agrees.
Information last checked: 6 November 2026.
Symptoms linked to this herb
Traditional uses from our symptom map. Not medical advice.
Where to buy
Supplement Hub (EU)Black Walnut Tincture — 59ml (Supreme Nutrition) · €40.32 · Tincture (ratio not stated)Supplement Hub (US)Black Walnut Tincture — 59ml (Supreme Nutrition) · See product page (USD) · Tincture (ratio not stated)Turmeric & Honey (UK)Black Walnut Tincture — 59ml (Supreme Nutrition) · £36.99 · Tincture (ratio not stated)Femologist (US)Black Walnut (Juglans nigra) Liquid Herbal Tincture — 2 fl oz · See product page · Tincture (ratio not stated)Napiers (UK)Black Walnut Tincture (Juglans nigra) — Napiers · See product page · Tincture (ratio not stated)Supplement Hub (UK)Black Walnut Tincture — 59ml (Supreme Nutrition) · £36.99 · Tincture (ratio not stated)Check the label and the seller. A link is not a recommendation.
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