Popular blood cleansing herb sourced from the inner bark of the purple lapacho tree of Brazil and northern Argentina. Supports healthy immune system function, and intestinal health, and helps support healthy intestinal flora. Pau d’arco has unique compounds in its’ bark that work to reinforce the body’s defense mechanisms. Each tablet contains 500 mg pau d’arco bark and 48 mg calcium. Take 1 to 2 tablets twice daily between meals.