I just came across some canned beets and pickles that are at least 3 years old (long story). What should I do?
Home canned, or grocery-store canned in aluminum cans?
If home canned, if there is no visible mold that you can see and they’re still sealed properly - open one up and taste. If it tastes fine, and smells like it should then it should be fine to eat.
If it’s grocery-store bought/canned, if there are no bulges in the can or on the lids, those too should be fine.
If you’re nervous about it, open everything up and add it to your compost pile.