There are no human clinical trials done on Provitalize itself so far. That said, we formulated Provitalize using ingredients that have been researched to provide significant benefits. We have selectively used ingredients that come under FDA's GRAS (Generally Recognized as Safe) list of ingredients. You may refer to the the bottom of our Provitalize product page to read more.
Rest assured, we have seen positive feedback from our global customers who take Provitalize. Feel free to ask for more info if required!