UFC featherweight No. 1 contender didn’t take too kindly to Jose Aldo’s comments regarding his use of “supplements” in a recent letter he released.

The two were expected to have their rematch next month, but an injury forced the bout to be postponed. Aldo, the reigning UFC featherweight champion, previously scored a first round knockout victory over Mendes in Brazil – and the second encounter could take place in the country later this year, possibly in October.

But for now, check out the response Mendes offered up in regards to Aldo’s comments: