My preference is for Life Extension Foundation. Large org with a mission beyond money.
For general manufacturers, I go with Now Foods, a large and US based company. LEF carries some of their stuff.
It’s plausible that LEF would care more about their reputation (and perhaps about their customers) than some random company which is selling through the big chains. Still, I’d like to know whether you’ve got a line of thought which is a little closer to the supplements themselves. For example, does taking the supplements produce effects which are a good match for what the supplements are supposed to do?
Sorry, no help on that score.
I’ve been taking their Life Extension Mix for probably 20 years. I’m still alive. So far, so good.