Since Popeye used spinach for strength,what did Bluto use to get so big,since he never ate spinach?

Because I don't know the real reason, I'm going to take the sarcastic smart alleck approach and say

"HE CHEATED BY USING STEROIDS!" No one would suspect he was using because he his it in his protein powder. Brings new meaning to protein powder (me utterly shudders! lol! )

Ok OOOOOOOOOOkay, I DID IT! I confess, I CONFESS! I stole the d--- spinach from Bluto so he can use it to beat up my ol' Popeye! WAAAAAAAAH!!!

As for Bluto, let me at 'em! I may have a walking stick and wearing round glasses, but I wanna slap 'em upside his head with my big purse!

(But on a serious note, did you know that there's a Popeye's brand spinach. I did not know that until this year!)

'roids!!!

He dipped everything in Olive Oyl.

omg, geohoop! i was about to use that!
well...he uses steriods

beer

he kept getting blue balled by Olive and the pinned - up sexual tension augmented his strengh. plus he trained for the strongest man competition.

He was just a big, muscular guy. Note that when Popeye ate the spinach, he didn't grow larger, but still became stronger than Bluto. Bluto was just naturally big and strong.