How Long Canned Foods Really Last Canned Vegetables (Corn & Green Beans): When stored in a cool, dry place, canned vegetables like corn and green beans can remain safe to eat for 1–2 years past the “Best By” date. Over time, there may be small changes in taste or texture, but the food is typically still fine to consume. Canned Tuna: Tuna has an even longer shelf life. With proper storage, it can stay safe for 3–5 years beyond the date on the can. However, some decline in quality — like flavor or texture — may occur the longer it sits in storage.