The Genova test that @caledonia suggests in her excellent document Roadblocks to Methylation is only available if you have acces to a pracitioner in your country who works with Genova. I don't (there are only two and they are very busy). What is the next best? Great Plains Labratory don't require a practitioner, is any of theirs about the same? http://www.greatplainslaboratory.com/select-a-test-2 Any other suggestions?