I know plenty of great guys who played D-1 and in the NFL.  The lineman I know lost massive amounts of weight.  These guys who likely did not use anything, I can never guarantee anything, but these are guys you would be shocked if they used.  They did consume massive amounts of food and watched their weight to not lose weight.  They all said that once done they wanted to feel healthier and ate normal.  Many lost 50-100 pounds, one lost close to a 100 lbs in a year (former ND player and NFL player).  This included players from BYU, Utah, ND, Stanford etc.

Stop with the generalizations.  This is like saying every BYU grad likely has 5+ kids, wears cargo shorts, is cheap, is late to every game etc....that would be stupid.