Black walnut (Juglans nigra) hull powder comes from the green outer husk of the walnut. Herbal cleansing traditions often pair it with digestive support protocols. People usually take it on an empty stomach as part of a short-term plan.
Mix the powder into water or juice. Many traditional regimens start with a small amount and slowly raise the dose over several days.
Stay alert to a few cautions: the husk contains juglone, which can irritate the gut in large amounts. Skip it if you are pregnant or breastfeeding. Stop using it if you notice stomach upset or other digestive trouble.