Quote:
Originally Posted by sworkhard
No, they not just caffeine. They are caffeine, vitamine b's, and some complimentary things to help reduce the jitters (some of them). If you take caffeine, a b-complex, and some calcium, and some pantothenic acid, your pretty much in the same place as a typical preworkout.
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I know there's other things in them. My point was the only ingredient actually doing anything is the caffeine.
Things like Calcium, vitamin B, etc... aren't used by the body immediately the way that caffeine is. And you probably have enough of them, if you have a good diet. Your body just excretes the excess. Having too much calcium can actually be harmful and lead to kidney problems.