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just zinc and magnesium, sometimes vitamin d, for regular men's health. creatine and caffeine for the workouts, of course, but those are hardly neccesary.
do note that, as a possibly wanted side effect, zinc and magnesium together will greatly increase both the quantity and power of your ejaculations. great if she's into that, or if you're alone, i suppose.
most of the other supplements you can take are scams, targeted at lazy degenerates, so be cautious around the pharma jew