Hi You-all......still haven't got a test done on the fava bean sprout tiincture...but it works for me ......pray for a researcher!!!! We may be having a fava festival in June here in east TN if anyone would like to come visit the farm ....please send a private message to let me know if you are interested in attending. We will conduct a workshop on how to make tinctures/ fermented papaya , etc God bless you Aunt Bean