Claims he was still natural in this picture:

Look guys I'll make this simple.
People have been injecting juice into body parts for DECADES. They've been injecting into their arms and other body parts trying to bring up weak spots, again for DECADES.
Despite that NO ONE ever had arms like Greg until synthol came onto the scene. I'm sure he injected loads of test (or whatever) into his arms, but to get the balbus look above he injected tons of oil. We can verify this as true because of how many Greg "followers" there are today (please see the Brazilian dude dance video, strong man truck puller and the 3rd world goof balls with the same build).
HTH