However — and this is important — the supplement version of Vivalis sits in a contested and unregulated (or loosely regulated) space: as with many “male enhancement” supplements, claims about boosting testosterone, dramatically improving performance or “circulation” should be approached with skepticism. I was unable to find credible, peer‑reviewed scientific studies verifying that the... https://www.youtube.com/watch?v=O4r8pNhOjzw