500 mg of Inner Bark Herbal Support Traditionally Used for Centuries Non GMO Project Verified A Dietary Supplement Vegetarian / Vegan Kosher Botanicals/Herbs Family Owned Since 1968 GMP Quality Assured Pau D Arco is derived from the inner bark of Tabebuia trees which are native to the Amazonian rainforest. Pau D Arco has been used by traditional herbalists for centuries. This traditional use is supported by the more recent discovery of many active compounds including lapachol and beta-lapachone.