An herbal remedy long used in Central and South American traditional medicine, pau d'arco is often touted as a natural cancer-fighter. Proponents claim that pau d'arco can help protect against cancer by stimulating the immune system, as well as by knocking out free radicals.
Sourced from the bark of a tree native to the rainforest, pau d'arco contains a number of antioxidants (including quercetin) and anti-inflammatory compounds. But while preliminary findings from animal-based research suggests that pau d'arco may help stop the spread of cancer, there is currently a lack of scientific support for the claim that pau d'arco can aid in cancer prevention or treatment.
For help in lowering your cancer risk, make sure to follow a balanced diet high in antioxidant-rich foods, exercise regularly, avoid smoking, and maintain a healthy weight. In addition, some studies show that people who get enough vitamin D may have a reduced risk for some types of cancer.