Adding IGF into the mix makes for a big difference. You body becomes much more sensative to insulin, thus yielding stronger results. Lots of the slin gurus all include IGF, just take a look at Red Baron's or Dat's protocols. Does IGF work in the mix? After several years of using slin and GH together, I can tell you that properly using IGF will yield better over all gains. At least in my case....and those who are following my protocol.
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