Latin Name: Juglans nigra

Family: Juglandaceae

Genus: Juglans

Common Names: black walnut, eastern black walnut, American walnut

Origin: native to eastern North America

Distribution Area: found in riparian zones throughout the eastern U.S.

Plant Part Used: bark, leaf, fruit (nut), and fruit hull

Botanical Information: The medium size of a black walnut tree varies from 70-90 feet tall and 2-3 feet in diameter. The branches are extensively spread and create a huge crown. The bark is thick and brown to grayish-black.  The bark is deeply grooved and has narrowing branched ridges. The small branches are thick with furrowed leaf scars and of light brown color.  The leaves are up to 60 cm long with 9-23 small leaves joined precisely to a sturdy rachis. There are about 17-50 stamens on the flowers, but no pistils. The shape of fruits is globular and the size is 4-6 cm in diameter. The fruits are yellowish-green, and are hidden in a stout, a bit fleshy hull, covered with small hairs.


As a result of laboratory studies, the following nutrients are found in the black nut:

  • Juglone is a biologically active substance, a natural antibiotic and a preservative, which in parallel has antifungal, mild laxative and antiparasitic action. Being non-toxic substance, it possesses powerful antitumor activity that allows to prescribe black nut preparations simultaneously with chemotherapy and thereby to facilitate its consequences. Juglone gives an iodine smell to the black nut fruits;
  • Tannins are tannic (astringent) substances that promote the healing of damaged mucous membranes and skin. Forming on their surface a protective film, they prevent infection of wounds;
  • Bioflavonoids strengthen the walls of blood vessels and provide lipotropic and antisclerotic effects. They normalize blood pressure and accelerate the stop of bleeding.
  • Anthocyanides related to flavonoids are potent antioxidants of natural origin. Derive salts of heavy metals, toxins, bind free radicals;
  • Organic Acids And Vegetable Fats;
  • A Lot Of Vitamins: ascorbic acid (50 times more than citrus), vitamin A and its precursor beta-carotene, all B vitamins;
  • Micro- And Macro Elements: selenium, magnesium, iron, silicon, potassium, phosphorus, manganese, cobalt.


The effect that a black nut has on the human body amazes with its versatility. It stops pain and relieves the symptoms of inflammation, stops bleeding, resorption of scarring and healing of skin and mucosal defects. It is proved that the black nut is active against many pathogenic bacteria, fungi and helminths. It cleanses blood and lymph, stimulates the immune system, is an antioxidant, used as an antiemetic, antispasmodic and astringent. For the first time, Hilda Clark, MD, from the United States, spoke about the use of black walnut in the treatment of oncological and parasitic diseases.

Indications for the prescription of black walnut medications vary extensively:

  • diseases of endocrine glands (thyroid, pancreas, etc.);
  • pathology of the musculoskeletal system (polyarthritis, osteochondrosis, arthrosis and arthritis, etc.);
  • allergic, fungal, bacterial, viral skin lesions;
  • multiple sclerosis;
  • malignant and benign neoplasms of various organs;
  • chronic intoxication (alcoholic, nicotine, etc.);
  • helminthic invasions;
  • migraine and chronic fatigue;
  • gynecological diseases, diseases of the urinary and digestive system;
  • tuberculosis of bones and lungs;
  • lupus erythematosus, rheumatism;
  • malaria;


Due to the biological activity of some substances of the black nut, its preparations are contraindicated for children under two years old, pregnant and lactating women. People who at least once had signs of an individual drug intolerance should not take black walnut medications. The consumption of black walnut must be very vigilant for people suffering from

  • peptic ulcer
  • cirrhosis
  • thrombophlebitis
  • alcoholism


Minor Interaction with Medications taken by mouth:

Black walnut hull includes a huge quantity of chemicals named tannins. Tannins soak up substances in the stomach and intestines. Concurrent consumption of black walnut and Oral drugs can reduce the amount of soaked medications, and lower the efficacy of your Oral drugs. In order to avoid this interaction, consume black walnut no less than one hour after oral drugs.


Black walnut extracts usually are obtained from its hull and leaves, and they are on sale in a liquid form, capsules and tablets. Some herbalists believe that a black walnut tincture, which is an alcohol extract, is the most effective preparation, according to the American Cancer Society.

“I could eat black walnut all the time, it’s not a flavor of the week!”

Herman Cain

*This article is for informational purposes only. We suggest consulting with a physician before using these or any other herbal supplements.