I have been researching papaya leaf tea for six years now. The tea is safe, based on a toxicity study in 2012. The FDA rates it as GRAS (Generally Regarded as safe). The tea is used at clinics in at least fourteen countries as alternative cancer therapy.
The goal of the Julia Ruffin Project is to promote papaya leaf tea for its effect on cancers. The other goal is to research and grow young papaya leaf tea (leaves from the plant, not the tree) because the leaves have more alkaloids when they are younger and also have a much nicer taste.