There has been a lot of discussion on this one, so you might want to "search" when you have an afternoon to kill. Things that come to mind in no particular order-
1) Best way to take it is to measure dry powder into empty pill bottle. When needed, add water, cap, and shake. Toss it down like a shot of whiskey.
2) About the warning re staining- amazing stuff! It will stain ceramic instantly. One thing that works is "Oxyngal" stain remover.
3) Like a lot of beans, there is an enzyme that will mess with your GI system if used regularly. Toast it in a low oven to deactivate.
4) Dosage reported in published research is much too high. Experiment.
5) Traditional useage includes as an aphrodisiac. It is. For both genders. As one of our number quipped, she knew something was up when her ex-husband started looking good. Takes about two weeks to max effect. Leave the pizza delivery boy alone unless he's legal.