All linked products are independently selected by our editors. If you purchase any of these products, we may earn a commission.

If you're like us, you've talked yourself out of a lot of good decisions, and into a few bad ones, because you couldn't tell what was actually worth it. VETTED is here to help. Whether it's a product, a procedure, or a place, we do the digging, ask the real questions, and try it ourselves before we tell you a thing. If it made the cut, it's because it earned it.

I have a complicated history with supplements. Most of them are, in my experience, elaborate placebos in attractive packaging. And don't even get me started on gummy vitamins. So when I kept hearing NMN come up in the longevity space — from The Skinny Confidential crowd to Bryan Johnson's entire public existence — I did what any reasonable skeptic does.…