Not hating, candi, but your rebuttal to flex's post was to mention that test wasn't ru in high dosages until the mid 80's, because flex said it had been decades.
I don't know what cuases the guts, but I know back in the day of the wasp waist, bbers seemed to take the off season "off" and these days they seem to up the dose.
Well I think its for a multitude of reasons but here are the main two factors in my opinion.
1. INSULIN! plain and simple, and it being used ALL year long.
2. The enormous amounts of food that pros eat nowadays, its rediculous, most of it isnt even used by the body id imagine, because of the mass amounts that they eat. When your eating thousands upon thousands of calories a day your going to get a big ass distended stomach.
Just two of the reasons, but my top 2.
Hopefully disgusted can join this conversation and add to what we've already speculated on.