Leaves, nuts, husk and the inner bark.
The active constituents in black walnut have antifungal, antiseptic and antiparasitic properties.
Black walnut is used for a variety of conditions including warts, herpes, poison ivy, bruises, psoriasis, herpes simplex, eczema, constipation, fungal infection, some internal and external parasitic infestations and it generally aids in the healing process. The hulls of the black walnut can also be used to make wool dye.
Use according to label instructions. Black walnut extract may be rubbed onto troubled areas of the skin twice daily.