Yep i was just about to say Lyle Alzado took them, and so apparently did Jim Haslett, i'm sure more players have as well. There is nothing we can do about it now, it's just good that the NFL is actually making an effort to be a clean league while the MLB gives you a slap on the wrist if you do anything like that.
Heck, the NFL suspends you if you take a diet thing that has something bad in it. Like they did to Julius Peppers a few years ago. The NFL is a clean league now, and thats something that they should take pride in.