Many years ago on a very late business day, I ate 15 year old oatmeal that was hiding way back in the cupboard late in the evening. I am still breathing. It did have an odd texture.
***I ate 15 year old oatmeal***
Last time I tried that some of the meal crawled and had developed wings. Same for rice an other grains.
“It did have an odd texture.”
Hence the “Best by” date - and not an actual expiration date. Canned food especially. Although sometimes I’ll open up a can and just can’t get past the odd texture, color and taste sometimes and toss it out. It probably was okay - but eating canned Ravioli with a brown sauce rather than the original red makes you question every bite. “Hmm, does this taste a little off?”
I drank some Gateraid last week that was three years past the date on the bottle. Figured sugar water should still be good. Tasted fine. Although shortly afterwards for several days my bowel symptoms were way off. I have no clue if it was due to the Gateraid or not - but I threw the other 5 bottles out.