Though it has been used for centuries, its fame really began in the 1960s. Dr. Theodore Meyer learned about the use of pau d’arco (pronounced powdy arco) by natives of the tropical rain forest of the Amazon. They had used the inner bark of this hardwood tree as a medicine. Dr. Meyer followed their lead and claimed he successfully cured five advanced cases of leukemia with it.
Now called pau d’arco (pow-DAR-co), which is Portuguese for “bow stick,” the term refers to various trees of the Tabebuia family that grow in the mountains of Brazil, Argentina, Bolivia, Paraguay, and Peru.
The same is also true of some of the doses that might be needed to kill bacteria or viruses. If you decide to take pau d’arco, do so only under your doctor’s supervision.
The pau d’arco tree is an evergreen tree that grows in the warm parts of Central and South America. It is a broad-leaf evergreen that grows to a height of 125 feet and has pink to violet-colored flowers. Its extremely hard wood makes it resistant to disease and decay. The inner bark of the tree is used medicinally. In recent years there has been an increasing demand for pau d’arco and, as a result, the trees are endangered.
Pau d’arco has certain anti-inflammatory and anti-viral activity, including against herpes I and II. It may reduce viral replication, according to a report in the Proceedings of the National Academy of Sciences.
Pau d’arco is available in health food stores in capsules, tinctures, and as dried bark. The recommended dosage is one to two capsules or one to two droppers of tincture taken one to four times per day, depending on the condition and patient.
Most pau d’arco products are not standardized, so it is not possible to determine whether or not they contain an appropriate amount of these active substances. It is important to carefully read the label to make sure that the product actually contains Tabebuia avellanedae as an ingredient.
Pregnant and nursing women should not use pau d’arco until it is sufficiently researched. Pau d’arco has been shown to have blood-thinning actions in some people, and may cause anemia when used long term. Possible side effects from ingesting too much pau d’arco include nausea, vomiting, diarrhea, dizziness, and stomach cramps. Another precaution consumers should heed is assuring that the product they purchase is produced by a reputable manufacturer. Some tested have very few active ingredients. The pau d’arco imported from Argentina is generally considered to be the highest quality bark.
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