/b/sixpacksmackdown/posts/bodybuilding-com-build-xs-review Build XS has been discontinued. This is a review of the pre/post workout supplement Build XS from Bodybuilding.com. I really like this product. Within 10 minutes I can feel it start to kick-in. Also, if you are looking for a caffeine free pre-workouen-USTelligent Community 11 Non-Production