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Was the ingredient in Jack3D really dangerous? Today John discusses a new study looking at the safety of 1,3 dimethylamine (DMAA) and caffeine over a 12 week supplementation period. Some good and bad things to report in this episode and as always a few muscle application tips. John always reviews the full text of every article, but to see the abstract of the study discussed, click here: http://www.ncbi.nlm.nih.gov/pubmed/23424215
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