Black walnut hull contains juglone — a naphthoquinone with antifungal and antiparasitic activity. Used in traditional herbalism for intestinal parasites and Candida. ZERO human clinical trials. Juglone is cytotoxic and genotoxic in vitro. Topical use for ringworm has historical basis. Internal use is NOT recommended due to lack of safety data and juglone toxicity concerns. --- *Reviewed by the Dose AI Research Team and Clinical Advisory Board* *Last updated: 2026-04-06*
Reviewed by the Scan Dose Research Team and Clinical Advisory Board | Last updated:
Not medical advice. Based on published clinical research and systematic reviews.