What supplement could this be?

Ok im not sure if anyone wll be able to help  me with this but ill try.

I kno this guy who took some supplement(says it was creatine) and he went from being somewhat big to jacked in like a month. But i shouldnt say the word jacked actually. His muscles just got so puffed up but he isnt as strong as he looks. It was a very big change in a short time. It probably was creatine but im just wondering if there is another supp out there that  does something similar to that to you.

thanks

I can't think of an individual legal supplement that will have that effect.

Currently using Mri black powder, BCAAs, animal cuts, beta alanine, milk thistle, Cytosport whey, ON casein, Zmax, SizeOn, T bomb II, flax seed, carnitine & conjugated linoleic acid. Going to hit epist

Maybe he's got a good stack for high NO levels?

steroids haa

YOU GOTTA EAT BIG, TO BE!

NASM certified trainer

yeah, only steroids will cause a change like that