[hn_throwaway_99]

It's actually not "quite simple" at all, and I think there is a gulf of difference (often misunderstood) about taking supplements as a personal decision because there is low risk of harm, there is some preliminary evidence they may be helpful, and one can afford them, versus touting them with certainty as the cure to a whole host of ailments without sufficient evidence, which is usually what "wellness influencers" and people selling supplements and "health optimization" programs do.

My grandmother lived to 102 and was mentally sharp right up until she died. She also smoked daily into her 90s.