Canned Goods Expiration Safety
May 28, 2016 - Is canned food past its expiry or Best Before Date safe to eat? Sandra, recently asked: “I have a carton of chicken broth that is expired.
- To prolong your canned food shelf life, focus on good canned food storage techniques. Canned Goods Expiration Dates. I never thought about how my grandparents checked food safety. So basic and true. Jacki Olson says. June 30, 2016 at 11:43 am.
- Jan 9, 2018 - According to their guidelines, canned food (when kept at relatively stable temperatures) will remain at peak quality for at least two years after it's been processed. They note that while food in cans 'retains its safety and nutritional value well beyond two years,' its color and texture may change after that time.
Confusion over expiration dates leads Americans to throw out food when it might still be good
Every day the average American throws out nearly a pound of food, according to a recent study from the Department of Agriculture. There are plenty of reasons why good, usable food gets tossed—picky kids, overstocked pantries, or even leftovers that sit in refrigerators too long.
But another major factor is the misconception about what all of those dates on food package labels—“sell by,” “use by,” and “best if used by”—really mean. Ninety percent of Americans misinterpret the dates on labels, according to a recent study from the Natural Resources Defense Council (NRDC) and throw out food that could still be consumed or frozen for later use.
That raises the question: If expiration dates aren’t a reliable gauge of food spoilage, how does a consumer know what to keep and what to toss?
What Date Labels Actually Mean
With the exception of baby formula, there are no federal regulations on date labeling. Often the “best if used by,” “sell by,” and “use by” designations are just manufacturers’ best guesses about how long their food will taste its freshest. Supermarkets may also use the dates as a guide when stocking shelves. But the dates have little to do with how safe the food is.
- Best if Used By/Before. This guarantees when a product is of the best quality or flavor. For instance, a jar of salsa may not taste as fresh or crackers may be soft instead of crisp after this date. It's not about safety.
Sell By. This is the date set by manufacturers to tell retailers when to remove the product from shelves. The goal is to ensure that the consumer has the product at its best quality, which can be several days to several weeks, depending on the item. For instance, milk, assuming proper refrigeration, should last five to seven days past its sell-by date before turning sour.
- Use By. This is the last date that guarantees the best quality of a product. This is also not a safety date except when used on infant formula.
According to a recent report from the NRDC and Harvard University, manufacturers typically use methods such as lab tests and taste-testing to set these label dates. But consumers have no way of knowing the background. In many cases, dates are conservative, so if you eat the food past that date, you may not notice any difference in quality, especially if the date has recently passed.
As a general rule of thumb, most canned foods (for example, canned tuna, soups, and vegetables) can be stored for two to five years, and high-acid foods (canned juices, tomatoes, pickles) can be stored for a year up to 18 months, according to the USDA. Watch out for dents and bulges in cans, though. That might be a sign it’s time to toss those products.
If you’re still not sure whether a product or item is worth saving past its date label, a free app the USDA created, FoodKeeper, will help you determine how soon specific items—everything from oats to coconut milk to maple syrup—should be consumed if it’s stored in the pantry or how long it will last in your refrigerator once it’s opened.
Staying Safe
While nonperishable items like grains and dried and canned goods can still be used well past their label dates, meat, dairy, and eggs are a different story. Although there are still no federally regulated expiration dates on those items, they obviously have shorter shelf lives. According to Sana Mujahid, Ph.D., manager of food-safety research at Consumer Reports, the best way to know whether a perishable food has spoiled is simply to “trust your taste buds and sense of smell.”
Foods past their prime often develop mold, bacteria, and yeast, causing them to give warning signs to your senses. Spoiled food will usually look different in texture and color, smell unpleasant, and taste bad before it becomes unsafe to eat.
Foodborne illness comes from contamination, not from the natural process of decay. That said, bacteria like listeria thrive in warmer temperatures, so it’s important to always keep your perishables refrigerated at the proper temperature. (The Food and Drug Administration says your fridge should be set no higher than 40° F.)
Also, a good rule of thumb is to throw out a perishable item after 2 hours at room temperature or half that time in high heat. Also keep all food preparation surfaces clean and avoid cross-contamination of raw meat and other grocery items.
“The most important thing that consumers should do is follow good food handling and storage practices, which can prevent unnecessary spoilage and ensure food safety,” says Mujahid.
How to Avoid Waste
Freeze it. “Freezing is an excellent way to halt the aging process and extend the life of foods that might otherwise go bad or get thrown away,” says Tyler Lark, Ph.D., a food-waste researcher at Gibbs Land Use and Environment Lab. Frozen foods won’t go bad because bacteria and other pathogens can’t grow in frozen temperatures. This even applies to milk, bread, cheese, and raw eggs (crack and lightly beat them first).
Save that fruit. According to the NRDC, fruit is one of the most common items to be tossed prematurely. Fruits like bruised apples, overripe bananas, or citrus like oranges and clementines that have dried up can be used in various recipes, for example, from the “Amazing Waste Cookbook” (PDF) created by the Nelson Institute for Environmental Studies at the University of Wisconsin-Madison.
Extend the life of produce. There are a variety of tricks for extending the shelf life of veggies, like wrapping broccoli in a damp paper towel, keeping celery in tinfoil instead of plastic, and sticking asparagus in a glass with a half-inch of water.
Organize your fridge. Studies have shown that out-of-sight foods are often forgotten, so keep the most perishable items up front on the highest shelves. And if you really want to get proactive, keep a list of the items closest to expiration. (Newer “smart fridges” can make this process even easier.)
- Compost. Composting expired produce or packaged items like bread is a great way to recycle food without contributing to more waste.
More From Consumer Reports
The winches strained and squealed and gradually the steamboat Bertrand was excavated from the silt and sand of the Missouri River and brought to the surface. The year was 1968. The Bertrand, a shallow-draft riverboat, had caught a snag north of Omaha, Nebraska and sank on April 1, 1865. The vessel was carrying goods to the gold camps in Montana and over 10,000 cubic feet of cargo were covered in the salvage effort – clothes, tools and medicine.
And plenty of canned foods including dried beef, oysters, peaches, mustard from France, and assorted brandied fruits. In 1974 a selection of the food from the hold of the Bertrand was sent to the National Food Processors Association for testing. The appearance of the fruits and vegetables and meats was somewhat gnarly, it was not a taste sensation and most of the nutritional value had long since evaporated but the scientists concluded the edibles were 100 percent safe to eat. There was no trace of microbial growth whatsoever.
And you are worried about the expiration date on the canned goods in your pantry?
Related: How To Preserve Beef in Glass Jars
What Makes Canned Food Unsafe to Consume?
There is only one thing that will impact the safety of the food consumers eat – contamination. The inside of a sealed can is a sterile environment. No air equals no microbes equals no harm to the food. The natural process of decay will sap the vitamins and savoriness of the contents but the food will carry no harmful diseases.
Not all food reacts the same way to its canned incarceration, however. High-acid foods – tomatoes, citrus and other fruits – do not support food poisoning bacteria in any conditions and the offending germs will shortly die in such an environment. Low-acid foods – mushrooms, meats, green beans – typically receive a zap of sterilizing heat before canning. So, if faced with a can of food of unknown origins and age the higher the acid the safer the contents.
A compromised can will be cause for concern. Any dents or damage in a can’s exterior may be an indication of seal issues. Any air that may seep into the interior can lead to disease-causing infection by bacteria. If a can is bulging or leaking it should be disposed of without consideration.
Fortunately there is no reason to worry about a can’s history before consuming its contents. That is because nature has provided each and every one of us with the best arbiter of a food’s safety available – our reliable senses. If food from a newly opened can looks rancid or smalls bad do not eat it, regardless of any date stamped on its lid.
Related: How the Early Pioneers Preserved Food and What They Ate
So What Should I Know about Expirations Dates?
The first thing you should about expiration dates know is where they come from in the first place. And that is not from the federal government or any consumer watchdog agency. Unless you are buying infant formula the federal government has no interest in dating food – and dates on baby formula are only concerning nutritional quality, not safety. Some 20 state governments meddle in the expiration date business but that is again about food qualityand not safety. And they are not issuing expiration dates but mandating that they are included on packaging.
The expiration dates are provided by manufacturers. And what exactly is “expiring?” There are actually two different guidelines consumers will encounter with canned food, a “sell by date” and a “use by” or “best by” date:
1 – “Sell by” date. This date is provided by manufacturers for the benefit of retailers. It is a suggestion – and only a suggestion – as to when the product should be removed from shelves. It is the manufacturer’s recommendation of when the product is at peak quality. With that date stamped prominently on a container the supermarket is obliged to remove the product or risk being sued should something go wrong – even though the contents are perfectly safe. That is why stores will throw out voluminous amounts of perfectly good food and sell products at deeply discounted prices when the ominous deadline looms.
2 – “Use by” date. This date is the manufacturer’s suggestion to the consumer of how long the product will be at peak quality. After that, the cookies may not be as crisp or the fruit salad as bright but the food is still fine to eat. It is the “use by” date that is the source of so many domestic squabbles as food lingers in pantries months and years beyond its supposed point of perfection.
How Do the Manufacturers Determine These Dates?
Again there are no rules and regulations on issue form any government agency. Instead, there are test kitchens and laboratory scrutiny and taste tests with panels of volunteers all paid and administered by the manufacturers of the products themselves.What does that mean to consumers? Well, there are no ways to know when a can is plucked off a supermarket shelf how rigorous these tests have been before any date is stamped on the can. Or if any method beyond pure guesswork was employed at all.
The date could be conservative, to be “on the safe side” of consumption for quality. Or a date may come from a formula for production that was used years ago. As Bill Murray reminded us in Ghostbusters, “It’s more of a guideline than a rule.”
So What Should You Do With Your Canned Foods After the Expiration Date?
Eat Up.The food is almost certainly fine, especially if only a reasonable amount of time has passed from any dates arbitrarily imposed on the package. If you want to live by a date on a can the United States Department of Agriculture says that high-acid canned goods should be good (and this is quality, not safety) for 18 months and everything else has a shelf life of 5 years.
It is estimated that Americans throw ten cents of every dollar’s worth of food into the trash. That’s works out to over $1,000 worth of eats per family – most of it still perfectly fine to consume – each year. Not only is that an unnecessary bite out of the personal pocketbook but food is a principle component of landfills and contributor to methane that is warming the planet. Not to mention all the fossil fuels and resources that were squandered to produce the food. It’s best for your wallet, it’s best for the planet – eat it.
Keep Them Stored. Canned goods will not last forever. A long time, yes, but not forever. You should probably eat everything you buy sometime in your lifetime. But you can maximize the shelf life of cans by minimizing temperature fluctuations. A steady environment of between 50 and 70 degrees is ideal but whatever you can provide avoid excessive heat and freezing.
And the drier the better. Moisture can begin the deterioration of aluminum of tin cans and will also contribute to mold and bacteria should the contents ever be exposed to oxygen. Sunlight will heat the contents and also negatively affect the shelf life of cans. It is not happenstance that people have stored food in cool, dry places for hundreds of years.
Compost. Since the food is likely still good to eat it will make a fine compost. Even if the canned goods have some preservatives or other chemicals the aerobic compost microbes will make short work of these and any other small contaminants. This also applies to any potentially spoiled food in a bulging or dented can.
Depending on your composting situation it is advisable to toss the canned food contents towards the center of the pile to minimize the temptation to rodents and other scurrying animals from scoring an easy meal. You can also dig a trench, dump the food into the ground, and cover it up with dirt.
Canned Goods Expiration Date Guidelines
Donate. Enlightened food banks will accept cans with expired dates – up to a point. Do not expect any food bank to take anything. Damaged and bulging cans will never be accepted. Others won’t accept any food beyond the package date. Check with your local charities for instructions; many have arrived at a policy regarding expiration dates.
Sell. Some people believe the best way to explode the food expiration myth is to commercialize it. Doug Rauch, once a president of Trader Joe’s supermarket chain owned by the German family trust of Theo Albrecht, has proposed a solution for the food that accounts for 40 percent of trash that winds up in America’s garbage. He calls it “Daily Table” and his business model is to create and deliver nutritious and affordable quick-eat meals from all of the “expired” food in grocery stores that can be obtained with deep discounts or for free.
Many grocery stores are already integrated with food banks and shelters but much of that food can not be dumped or passed on because of liability issues. Entrepreneurs are increasingly coming up with schemes to churn this daily dump of food into money-making enterprises. Some day soon they may be looking to buy back canned food in private pantries.
Recycle. You can open the cans, wash them out and recycle the metal. This conscientious act does require some care, especially if you have damaged cans and jars. There are even government white papers dispensed just to outline the detoxification process involved in disposing of the contents of unsafe home canned foods.
At the very least wear latex gloves and be ready to attack any spillage with a good bleach solution. The potential botulinum toxin can be dangerous if it contacts the skin, not just when it is ingested. But when the cans are emptied and rinsed the metal containers can be safely recycled.
Toss Them. In economics it is called “sunk costs.” You have already spent the money and the salvage value of the purchase is so diminished that there is nothing left to do but throw the cans out. You may want to double up on the plastic garbage bags to be certain the cans do not break out and break open on the way to their final resting place in a landfill.
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