I ate some plain yogurt that was a month past expiration date yesterday. I didn’t die. I did notice it was a lot thicker than the other carton I bought at the same time. Eat it and report back to us if you died. The live bacteria that are in yogurt are supposed to be good for your gut health. The more bacteria the better. Ask petite, she has eaten a lot of stuff past the expiration date. The flavored yogurt with fruit in it I would be leery of, the plain yogurt not so much.