Pau d'Arco bark has been used by shaman in Brazil for at least a thousand years. Its use gradually spread to other parts of South America and beyond.
About Traditional Medicinals:
The chemists at Traditional Medicinals work with well-respected herbalists and pick from ingredients that have proven effective for thousands of years in order to create the most healthy and effective self-treatment teas available. In 1982, they became the first herb tea company in the U.S. to develop over the counter herbal tea drugs by adhering to applicable FDA rules and regulations for herbal substances.