Black walnut contains flavonoids, tannins, ellagic, tannic and gallic acids, juglone, nucin, trace minerals, and vitamins.

The dried green hulls of this plant are very bitter, with astringent properties. They are considered to be alterative, tending to restore normal health. They are well-known as astringent restoratives.

This plant cleanses and purifies the blood. It is very effective in the treatment of intestinal parasites, fighting them and expelling them from the organism. It has a laxative action as part of the detoxication and decongestion action on the organism, affecting the whole system.

It is very beneficial in a variety of skin disorders. It has a great amount of minerals, trace elements, and amino acids. It should be used in bone disorders and mineral deficiency.