Canned foods are a pantry staple, offering a convenient, versatile, and affordable way to safely store and consume food. From protein-rich tuna to flavorful tomatoes, canned goods are essential for every well-stocked pantry. But How Long Is Canned Food Good After The Expiration Date? While known for their long shelf life and ability to provide ingredients for emergencies and quick meals, canned goods do eventually reach a point where consumption is no longer safe. Food safety experts offer insights into the lasting power of canned foods and the best storage practices to prevent spoilage.
:max_bytes(150000):strip_icc()/expired-gone-bad-how-to-tell-getty-0323-8ad6cfa6bedd4567a91d8d811ba6a169.jpg)
Understanding Dates on Canned Foods
It’s crucial to understand that the dates on canned goods indicate quality, not safety.
Mitzi Baum, MSc, a food safety instructor at Michigan State University and CEO of STOP Foodborne Illness, explains that canned foods may display various dates and numbers. These include the manufacturing date, facility information, lot code, and “use by” or “sell by” date.
“Use by” and “sell by” dates typically relate to the product’s optimal quality, flavor, and freshness. Baum notes that after this date, the manufacturer cannot guarantee the product will maintain its best taste. This means the food may still be safe to eat, but the quality may decline.
Canned Food Shelf Life: Beyond the Label
So, how long does canned food actually last? According to Bryan Quoc Le, Ph.D., a food scientist and author, canned food can last indefinitely, or at least several years beyond the date on the label.
Generally, high-acid foods like tomatoes maintain their quality for about 18 months after the “use by” or “sell by” date. Low-acid foods, such as meats, beans, and vegetables, remain at their peak quality for two to five years. It’s important to note that these are estimates, and the actual shelf life can depend on storage conditions and the can’s condition.
Identifying When to Discard Canned Food
While canned foods have a long shelf life, they must be stored properly to maintain their quality. The condition of the can is critical to the safety of its contents. Regularly inspect your canned goods for any signs of damage that may compromise their integrity:
- Dents: The USDA advises against consuming food from cans that are leaking, bulging, severely dented, punctured, or rusted. Dents can compromise the can’s seal, allowing bacteria to enter.
- Rust: Light surface rust is generally not a cause for concern. Baum suggests that if you can wipe the rust off with a wet cloth, the food inside is likely still safe. However, if the rust is extensive and cannot be removed, discard the can. Refer to the Packaged and Canned Food Defect Guideline by the Association of Food and Drug Officials for photos that can help determine if a dented or rusted can is safe to consume.
- Unusual Smells: If a canned food emits a foul odor or spurts liquid upon opening, it should be discarded immediately. This could indicate spoilage or the presence of harmful bacteria.
The Risk of Botulism
Deformations in cans can create microscopic holes, allowing small amounts of oxygen to enter. Le explains that this creates an environment where Clostridium botulinum spores can develop, leading to the growth of the bacteria and the production of botulinum toxin. Botulism, a rare but serious illness, affects the body’s nerves.
Proper Storage of Canned Foods
Proper storage is vital to ensure the longevity of canned foods. Le recommends storing canned goods in a cool, dry place, as warmth and moisture can accelerate damage and rusting. Avoid storing canned goods under the sink, above the stove, or in damp basements, as these areas are not suitable due to fluctuating temperatures and humidity, according to the U.S. Department of Agriculture. Additionally, canned goods should not be exposed to extreme high or low temperatures, which can increase the risk of spoilage or ruptured cans.
Considerations for Home-Canned Goods
Baum suggests that home-canned goods, if processed correctly, can last for years. While the quality and nutritional value may decrease over time, the food will generally remain safe to consume. However, if the lid of a home-canned item pops or bulges, discard it immediately. This indicates that bacteria not killed during the canning process have grown and released gases, causing the lid to pop or expand.
Ultimately, understanding the dates on canned foods and practicing proper storage techniques can help extend their shelf life and ensure your safety. Always inspect cans for signs of damage and heed any warnings about unusual smells or appearances. When in doubt, it’s always best to err on the side of caution and discard the item.
