Black Walnut Hull or Juglans Nigra is, just as it sounds, the hull of the black walnut tree. The Black Walnut tree grows in the eastern US and parts of Canada, and while easy to grow, it is not plentiful.

Black walnut has been used for centuries. It's been used to treat intestinal problems, snakebites, open wounds, ulcers, scurvy, and as a laxative.

The outer hull's dark colour was used in brown hair dye until the early 1900s. It contains beta-carotene, acids, calcium, iron, magnesium, manganese, phosphorus, potassium, selenium, silicon, zinc, tannin, B-vitamins, and vitamin C.

It is known to be a gentle and effective laxative. Black walnut is known as an effective anti-viral and is used to fix warts, which are caused by viruses. Black walnut is an anti-fungus and has been used to fight herpes, cold sores, athlete’s foot, and Candida.

How it is Used Black Walnut Hull may lower blood pressure and cholesterol, burn toxins and fat, and balance blood sugar.

Black Walnut Hull (and leaves) contain astringent tannins that shrink sweat glands and reduce sweating. The herb is said to reduce menstrual blood loss. It controls diarrhoea.

Black Walnut Hull is a digestive tonic. Colic, heartburn, and flatulence are relieved. As a cholagogue, it stimulates bile flow into the intestines, easing bilious colic and spleen pain.

Black walnut hulls are safe for occasional use of up to 2 weeks at a time, but black walnut heartwood is not. Avoid herbal remedies which contain heartwood.