I used to eat alot of sandwiches and toast because they were quick to make. Then one day I made a couple sandwiches and realized. The damn bag was full of fruit flies. It was tossed immediately. When I finally had the urge to try a pb&j again after a few years, there was 1 jar of peanut butter that was years old. The other was opened, I was too scared to try that one. The 2 y/o unopened tasted fine though.