Gregg Valentino is one of the most controversial, yet popular bodybuilding icons, and is considered by some as the biggest bodybuilder ever. He holds the record for the biggest biceps in the world at 28". He started bodybuilding at the age of 13 and after over 23 years of training naturally, Gregg decided to experiment with steroids (and some say he's injecting Synthol). During this time, his arms grew from an impressive 100% natural 21" to an inhuman 28". After years of steroids injections, his body finally fought back—his bicep "exploded.” He eventually went to jail for steroid possession and is now rebuilding his life.