Juglans Nigra (Black Walnut Hull) Powder:

Juglans Nigra Powder or Black Walnut Hull Powder is derived from the outer covering of the nut, otherwise known as a “hull,” of the tree. Black Walnut Hull Powder contains high concentrations of chemicals called tannins, which can reduce pain and swelling and dry up body fluids.  This makes it a natural antifungal that is used in treating athletes foot, jock itch, and other skin conditions.

Can be found in the following O Naturals Products: Tea Tree & White Clay Foot Powder