Black Walnut Shell
Black Walnut Shell- You may have eaten ground walnut in desserts or in savory dishes such as pesto (it is a common and less expensive substitute for pine nuts), but it is actually the seed of the juglans nigra  – a northern hardwood tree that grows to as much as 100 feet in height.
The black walnut is covered with a green pulp until autumn, when it falls to the ground and turns black. Black Walnut Shell, or coating of the nut inside. It has long been important in Russian folk medicine as well as that of India and Pakistan, where it is known as akhort.
In the 18th and 19th centuries, a tincture or extract of black walnut hull was used to treat syphilis, but was not particularly effective (though preferable to the alternative, which was toxic mercury!)
Traditionally, Black Walnut Shell has been used to eliminate intestinal parasites; some travelers carry the extract of the juglans nigra when in places in which water is of questionably quality. The early results of some laboratory studies suggest that black walnut hull powder or tincture may also reduce the risks of developing cancer.
Dried Black Walnut Shell may be taken in a capsule or used to create a tincture or liquid extract; however the taste is quite bitter.