Black walnut


Black walnut (Juglans nigra) is a large tree known for its high-quality wood and edible nut which is commonly used as a food ingredient.
The U.S. Food and Drug Administration (FDA) announced a health claim stating that eating 1.5 ounces per day of walnuts as part of a diet low in fat may reduce the risk of heart disease.
Black walnut has been shown to contain chemicals called tannins which may help with irritation and may improve tissue firmness. Traditionally, it has been used to relieve constipation and diarrhea.

Related Terms

American walnut, ellagic acid, Juglandaceae (family), Juglans nigra, juglone, methyl 2-benzimidazolylcarbamate, nogal americano, nogueira-preta, noyer noir, plumbagin, quinones, sesquiterpenes, Schwarze Walnuss (German), tannins.

evidence table

These uses have been tested in humans or animals. Safety and effectiveness have not always been proven. Some of these conditions are potentially serious, and should be evaluated by a qualified healthcare provider.