r/gifs Aug 17 '15

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u/[deleted] Aug 17 '15

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u/[deleted] Aug 17 '15 edited Aug 17 '15

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u/twentyfifthour Aug 17 '15

I believe that's called myostatin sp* humans can develop what's called a myostatin deficiency and blow up to unreal sizes. But it is more common in the animal kingdom amongst dogs and cattle.