For vitamins/supplements specifically, there's Costco, iHerb, nootropics depot. While they might not be the absolute cheapest options, they're usually a pretty

For vitamins/supplements specifically, there's Costco, iHerb, nootropics depot. While they might not be the absolute cheapest options, they're usually a pretty good price and at least with those sources I'm not too concerned with counterfeit or tainted supplements, unlike Amazon [0] [0] https://news.ycombinator.com/item?id=20499808 https://news.ycombinator.com/item?id=20499808