The black walnut hull is the dry outer shell of black walnut, is considered a tonic that aids digestion and the intestinal systemand fight intestinal parasites. It may help to lower blood pressure, cholesterol levels and blood sugar levels.**To make Tea: Put 3 tablespoons of black walnut hulls in a quart of water bring to boil, simmer for twenty minutes ( adjust to taste by adding water if too strong), strain and drink 1-3 cups per day.Warning: *These statements & products are not intended to diagnose, treat, cure, or prevent any disease. Always consult with a healthcare professional before using any herbal remedy.