SYNTHOL? WHO CARES!
Synthol is a plumping oil that many bodybuilders inject into their muscles for extra size. Pretty much every bodybuilding magazine, web site, and discussion board
accuses Greg of inflating his arms with Synthol.
Greg's a smart man and he's never commented on Synthol one way or the other. And he shouldn't. No good ever comes from discussing private issues in public.
Everyone has the right to shape his body however he wants. This topic has been covered to death on "body modification" forums. Greg obviously wants huge arms, so he gave himself huge arms.
Who cares how?