A Herb for Parasites and More - Black Walnut

Black Walnut Herb
I remember my first time truly noticing the black walnut tree; what I saw was that nothing could grow around it. I found this to be quite unusual in an otherwise vibrant, diverse woodland. That day, I learned about black walnut's allelopathic (growth-inhibiting) effect on some plant species. The fact that not much will grow under a black walnut tree is likely due to its juglone compounds. 

Another remarkable thing about the walnut tree is that although it may grow thousands of kilometers away from any seawater or sea vegetation, scientists have found that it's high in iodine and has the power to change one mineral to another through biological transmutation. The iodine found in black walnut (or Juglans nigra) is organic, antiseptic, and healing.

Plant Description 

Black walnut is a native North American deciduous tree that grows to a height of 15–23 meters, with a trunk roughly one meter in diameter. Approximately two meters from the ground, the tree divides into numerous neatly horizontal, wide-spreading branches with smooth grey bark that forms an upright, umbrella-like crown in the woods or a round-topped crown when out in the open. The leaves vary from 30–50 cm long, consisting of seven or eight pairs of leaflets along a central axis and a single leaflet at the tip. Leaflets emerge very late in the spring and are yellow-green in color; in the autumn, the leaves are yellow. Its flowers are inconspicuous in elongated green clusters. The fruit is three to five centimetres in diameter consisting of a hard shell, a furrowed nut enclosed in a green husk, and becomes darker when ripe.


It was said that in the “golden age” when people lived upon acorns, the gods lived upon walnuts hence the name of Juglans, Jovis glans, or Jupiter’s nuts. The name walnut comes from the German wallnuss or welsche nuss, which means “foreign nut.” The walnut was dedicated to the goddess Artemis in Ancient Greece, and the tree symbolized wisdom, fertility, longevity, and strength in adversity.6 The late Nicholas Culpeper, a renowned English herbalist, suggests that the bark is very astringent when he states, “Doth bind and dry very much.” He also says that the mature bitter leaves are useful for killing broad worms in the stomach, and the green hulls boiled with honey are a great remedy for sore throats and inflammation of the mouth and stomach.7 Black walnuts have historically been used to dye fabrics a rich tan to dark brown colour. The hulls have the most concentration of stain and cannot be removed with soap and water alone. Any natural fibre may be dyed with Juglans nigra.

Medicinal Properties & Indications 

Digestive System

Juglans nigra is one of nature’s most powerful anthelmintics or antiparasitics. It eradicates the overgrowth of microorganisms like bacteria, fungi, and yeasts, as well as addresses parasites, worms, and flukes. It is used as a remedy for digestive and liver insufficiency with possible jaundice, headaches, and tissue congestion. Naturopathic doctor Jill Stansbury writes about using it when there is a dry, acrid feeling in the throat and mouth.8 It may also be used specifically when there is soreness in the tonsil area experienced as a sensation coming from the external neck and throat, rather than from the inner throat.9 Though not specific for skin disorders, the colon cleansing and tonifying effects of the herb provide benefits for chronic skin disorders caused by imbalances of digestion and assimilation.


» parasites 

» worms - pinworms, threadworms, roundworms, hookworms, giardia 

» flukes - liver flukes 

» candida 

» fungal infections 

» irritation of the intestines 

» inflammation of the intestines 

» constipation 

» diarrhea 

» liver congestion 

» gallbladder congestion 

» intestinal permeability  » dysbiosis

Endocrine System 

As a superlative herb for the thyroid, Juglans nigra is both stimulating for hypothyroidism, and a nourishing trophorestorative. 

Juglans nigra is the remedy for times of change in life. It’s an ally for advancing the stages of maturity (e.g., teething, puberty, menopause) or big life-change decisions that break conventions, helping us leave old limits and habits behind.


» hypothyroidism  

» goitre 

» low metabolism 

» boils 

» abscesses 

» electric shocks (often due to mycotoxin illness)

Contraindications & Safety 

» pregnancy

» breastfeeding

Use caution with long-term use. 

Preparations & Applications 


Tincture (1:5): Adult: 5 mL three times daily (TID) 


>1 yr: 1–3 gtts (drops) TID 

>2 yrs.: 1–2 mL TID 

2–4 yrs.: 1–3 mL TID 

>5 yrs: 3 mL TID

Tea (Infusion): Add 1–2 tsp dried hull with 8 oz hot water. Cover and steep for 10–30 minutes. Take 3 c/day for adults, ½ c/day for children between 2–5 yrs., ½-1 tsp of tea for children 1–2 years of age.

RECIPE: Black Walnut Maple Syrup  


» ¾ c maple syrup (½ c organic brown sugar or sucanat can be substituted)  

» ¼ c (2 oz) organic orange juice 

» Zest of one organic orange 

» Zest of one organic lemon 

» 2 large egg yolks (pastured) 

» Pinch of Celtic or Himalayan salt 

» ¼ c (2 oz) dry white wine 

» 2 Tbsp black walnuts, lightly toasted and crushed  

» 1 Tbsp unsalted organic butter

  1. Bring the maple syrup to a boil, then turn down the heat and simmer for 5 minutes to reduce it by one-third. Whisk with the remaining ingredients. The butter will melt as the rest of the sauce cooks. 
  2. Place the mixture in a metal mixing bowl, then place the bowl on top of a small saucepan of simmering water. Cook for 20 minutes, stirring occasionally with a wooden spoon until the mixture thickens and the egg has activated. 
  3. Cool, cover, and refrigerate. 
  4. If the sauce tightens in the fridge a bit, a splash of lemon juice will refresh it.
Enjoy the syrup as you might enjoy honey on top of yogurts, cheese ice cream, or on toast.