Ambrosia peruviana is found in all the Americas and even in Europe and Asia. It is an invasive noxious weed - that has been used in medicine for centuries, if not millennia. Recent discoveries have shown it is capable of curing many types of cancer. While we are concentrating on breast cancer at the moment, it has proven successful in other types, including lymphoma, liver, colon, prostate, and more forms of cancer. It is safe, available, and cheap. It could even be a weed in your yard!