I have a 2lb canister of CytoGainer from almost a year ago that is open. It only had like 4 servings out if it I stopped taking it because the creatine gave me headaches. My buddy wants it and I told him I'd give it to him but I wanted to make sure it was ok first since it's been sitting all this time opened (lid on seal broken) so should it still be fine?

bumpy

Anyone??

I had some whey that went bad. I was able to tell by the taste though. It started tasting really nasty and wouldn't mix well. I would assume that since they put an expiration date on there that it has to mean something.

I'll have to look at what the experation date says if it's close to or past the date I will definitely toss it out then.

Creatine denatures into Creatinine over time, triggered by moisture. In water, it happens pretty fast (8-12hrs), but simple humidity with eventually make it denature. Not harmful to you, but pretty useless, as creatinine has no real muscle-building benefit.