Pau d'arco tea: a tea that kills yeast?

I learned from a book that this tea might kill yeast, which means good for yeast-related CFS.

Pau d'arco is a tree that withstands severe wind and harsh weather. It is found extensively in south America. The tea is made from the inner bark of this tree that used to be reffered as "Devine tree" by Incas.

I found it in local Vitamin Shop for $5.99 (or $4.99?). The picture I put here is the exactly what I got. I was told that it tastes not so pleasant but I found otherwise:)

Of course you can also purchase it from online.