Free Radical Scavenger Supports Healthy Cells A Dietary Supplement Vegetarian - Vegan Botanicals/Herbs Family Owned Since 1968 GMP Quality Assured Pau D'Arco is derived from the inner bark of a tree growing in the Amazonian rainforest. It has been used by traditional herbalists for centuries. Our extract is concentrated to highlight some of the active components naturally present in Pau D'Arco that may support healthy cell growth and have free radical scavenging properties.