When we first saw Provestra advertised, it was through this kind of shady, meandering video that took forever. We tried clicking out, and when we said cancel, it took us to this page where we could read about it. It turns out it’s a guide, or set of guides that are designed to help you fix your ED on your own. Obviously we can’t say whether or not those guides will be effective for you personally, but here’s what we know about the primary guide Provestra. The guide is apparently tooled to helping combat inflamed capillaries. They claim that the “vessels in and around your penis can’t fully open.” Whether there’s any truth to this basic claim, we’re not sure. But it doesn’t exactly sound science-based.