Black Walnut Hull
Juglans nigra
Limited Evidence
evidence: limited
Scientific Summary
**Black walnut hull is the green outer bark of the black walnut tree (Juglans nigra).** It is most often used as a natural anthelmintic and antimicrobial, helping to support digestive health and control parasites, and its extracts appear in topical doses for skin care. Because it contains juglone, large or prolonged ingestion can irritate skin or mucous membranes and may not be suitable for pregnant or nursing women, so it should be used in moderate doses and under professional guidance.
Source: Trease & Evans Pharmacognosy 16th ed
