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Originally Posted by Macro  there is very mixed data on caffeine and insulin sensitivity. Also keep in mind that training, which none of these studies take into account, has a significant impact on the metabolic effects of many compounds. Since using caffeine with and without exercise produces very different effects on plasma levels of things like FFA's, insulin, blood glucose, etc... |
Yes the short term studies tend to say one thing and long term another, still I get my caffine though green tea. With the info available I'd say either use caffine everyday in moderate amounts or not at all.