I ate of it out of several cans over a period of months, and did have friends sample it.
Canned foods don’t make you sick, they can only change in flavor and quality and nutrition, but they are still safe to eat, with only the normal canned food rules applying, in other words, as long as the can is still sealed and not bulging, eat it.
Having eaten startlingly old C-Rations in the early Eighties- I concur. They only made me think I was sick.