subject: Going South of the Border for Medical Treatment [print this page] Stem cell treatment abroad is controversialStem cell treatment abroad is controversial. Many people fear going out of the United States for medical treatment. However, for stem cell therapy, Mexico remains your best option. In Mexico, stem cell therapy is legal and commonly performed. It will take years for the United States to resolve the controversy over stem cell therapy. Until then, if you want stem cell treatment, Mexico is your closest option. Due to its proximity and lower medical costs, it is likely the most affordable one as well.