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Parasites and the Anti-Parasitic Properties of Black Walnut: A Naturopathic Perspective

Written by Portland Clinic of Natural Health on August 31, 2023

Parasites – organisms that live on or in a host organism and derive nutrients at the host's expense – have been a health concern for humans for centuries. They can cause a range of symptoms, from mild digestive issues to more severe health conditions. From the naturopathic viewpoint, holistic and natural interventions have long been used to address parasitic infections. One such remedy, which has garnered attention for its anti-parasitic properties, is black walnut (Juglans nigra).

Understanding Parasites

Parasitic infections can be caused by various organisms, including protozoa (like Giardia) and helminths (like tapeworms and roundworms). While not all parasites cause noticeable symptoms, some can lead to digestive discomfort, fatigue, skin issues, and other health problems. Parasitic infections can be acquired from various sources such as contaminated food, water, or through vectors like mosquitoes.

Black Walnut and Its Anti-Parasitic Properties

Black walnut hulls have been traditionally used in herbal medicine as a remedy against parasitic infections. Here's what the evidence suggests:

Tannins and Juglone

Black walnut hulls are rich in compounds like tannins and juglone. Tannins possess astringent properties that can help reduce the food source for parasites and potentially damage their outer layer. Juglone, on the other hand, is a natural chemical with various therapeutic effects, including anti-parasitic actions. (1, 2)

Traditional Use

Naturopaths and herbalists have traditionally used black walnut hulls in combination with other herbs like wormwood and clove to address parasitic infections. This combined approach is believed to target various stages of the parasite's life cycle.

Safety Considerations

While black walnut has a historical context of use for parasitic infections, it's important to use it under the guidance of a knowledgeable healthcare practitioner. Some people might be allergic to tree nuts, including black walnut, and its usage can interact with certain medications.

In Conclusion

Parasites remain a concern in many parts of the world, and while modern medicine offers specific treatments, natural remedies like black walnut continue to be explored for their potential benefits. As with all natural interventions, it's vital to be informed and consult with professionals before embarking on a treatment path.


  1. Sharma M, Sharma M, Sharma M. A comprehensive review on ethnobotanical, medicinal and nutritional potential of walnut (Juglans regia L.). Proc.Indian Natl. Sci. Acad. 2022;88(4):601–16. doi: 10.1007/s43538-022-00119-9. Epub 2022 Sep 22. PMCID: PMC9510174.
  2. Ho KV, Lei Z, Sumner LW, Coggeshall MV, Hsieh HY, Stewart GC, Lin CH. Identifying Antibacterial Compounds in Black Walnuts (Juglans nigra) Using a Metabolomics Approach. Metabolites. 2018 Sep 29;8(4):58. doi: 10.3390/metabo8040058. PMID: 30274312; PMCID: PMC6316014.

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