Are my old cans still safe to eat?

One of the questions we hear a lot at AnswerLine is: How long can I keep cans of food? Often, these callers are doing some spring cleaning or moving an elderly relative into a new home. They discover a number of cans that are several years old and wonder if it is still safe to use those cans.

photo 4The way cans are stored will affect the life of the food inside the cans. If foods are stored in a cool, dry place with a stable temperature they will last longer than cans stored in places where the temperature fluctuates widely. Damp storage areas can cause the can to rust which will also shorten the shelf life of the can.

Acidic foods, like fruits, have a shorter shelf life than low acid foods such as meat or vegetables. Dented, swollen, or rusty cans are an indication that the food inside the container is no longer safe to consume. This may also be an indication that the botulism bacteria, Clostridium botulinum, are present. Even a tiny exposure to these bacteria could be deadly. Discard these cans safely, in a spot where no other person or animal will be tempted to eat the food.

I was surprised to find this can in my own pantry.  The best if used by date was February 15, 2010.  Generally speaking, commercially canned food will be at good quality for photo 22-5 years after the best if used by date.  This can was peach pie filling, so the acidic nature of the filling shortened the shelf life of the product. We would advise you to use home canned foods within the first year or two at the most.

If the lid or inside of the can appears corroded when you open it, the food inside should still be safe to eat. Acid foods can cause this reaction during storage time. The taste, nutrition, and texture of foods will decline over long storage times. Remember to bring the older cans to the front of the shelf as you put groceries away after a shopping trip. This kind of inventory control can help prevent food waste.

Liz Meimann

I received both my undergraduate and graduate degrees in Food Science at Iowa State University. I love to quilt, sew, cook, and bake. I spent many years gardening, canning, and preserving food for my family when my children were at home.

More Posts - Website

Leave a Reply

Your email address will not be published. Required fields are marked *

AnswerLine

Subscribe to AnswerLine Blog

Enter your email address:

Connect with us!

AnswerLine's Facebook page AnswerLine's Pinterest page
Email: answer@iastate.edu
Phone: (Monday-Friday, 9 am-noon; 1-4 pm)
 1-800-262-3804 (in Iowa)
 1-800-854-1678 (in Minnesota)

Archives

Categories