Actually, "tainted" supplements are pretty rare. Every NCAA athlete is scared about it during orientation, but if you're buying protein or creatine or something normal from a normal shop, you're 100% safe. The only times people end up with actually tainted supplements is when they buy something like "XTRA TEST BOOST SUPREME" or some trucker speed at a gas station. Elite endurance athletes really have no business buying sketchy preworkouts. Didn't like NoExplode contain some amphetamine for a bit? But that's not something any actual athlete would be buying. The only thing Meade would be buying is like protein or beta alanine, and if it's from a half-reputable brand it'll be A-okay.