Image: Eggs
John Brecher  /  msnbc.com
Eggs can be good for between three and five weeks past their expiration date, according to ShelfLifeAdvice.com, a food storage reference website.
By
msnbc.com contributor
updated 8/6/2010 9:42:36 AM ET 2010-08-06T13:42:36

Newlyweds Ty and Mike Kelty of Atlanta were consolidating their kitchens when the issue of expiration dates erupted.

Ty has a looser view of how long food is good beyond the date on the packaging. Mike occasionally has let something slide a day, but after that, ‘’even if it’s a whole gallon of milk, I’m throwing it out,’’ he says.

So her old rice and flour were tossed. “The stuff that went back to 2007 and 2008, it had to go,’’ he says.

Most Americans are like Mike. A new survey found that three in four U.S. consumers believe certain foods are unsafe to eat after the date on the packaging has passed. But experts say that if most foods are stored properly, they can be safe for days after the ‘use by’ date.

The recently released survey was sponsored by ShelfLifeAdvice.com, a food storage reference website that estimates U.S. consumers unnecessarily discard billions of dollars of food a year.

The Food and Drug Administration says the food date does not equate to safety. “If something is past its date, and stored properly, often it’s OK," says Ira Allen, an FDA spokesman.

Foods that can last far beyond an expiration date with proper storage include flour, sugar, rice and cake mixes, says Michael Doyle, director of the University of Georgia’s Center for Food Safety. “There’s no reason that dry goods wouldn’t be safe except if it becomes wet.’’

Peanut butter can be good for months beyond the date, too, he says.

You could get an extra year out of a breakfast cereal if it’s stored in a cool, dry place, adds Joe Regenstein, a professor of food science at Cornell University. Using closed containers for items such as rice or flour can extend their life, he says.

Toothpaste? “I have yet to figure out what can go wrong’’ with it, Regenstein says. Frozen foods, though, can form ice crystals that can ruin their quality, Doyle adds.

Eggs can be good for three to five weeks past the ‘use by’ date, according the website ShelfLifeAdvice.com, which allows users to look up specific foods.

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Watch out for cross-contamination
Rather than focusing only on the expiration date, consumers should pay close attention to cross-contamination, temperature control and sanitation issues that can lead to dangerous foodborne illnesses, these food safety experts say.

Salmonella and E.coli strike fresh products such as meat, produce and dairy. “Pathogen contamination is much more of a threat to people’s health than shelf life spoilage, ’’ Doyle says.

The date “tells us that the product will soon spoil,’’ says Doyle. “It gives us a few extra days before spoilage.’’

“Within a couple of weeks, it’s likely to spoil and not taste or smell good,’’ he adds. But even then, it’s not always harmful.

Most spoiled food is just yucky, resulting in perhaps a stomach ache if consumed, Regenstein says.

The FDA says molds on food can cause allergic reactions and respiratory problems, and that a few molds can have mycotoxins, which can make you sick.

'In most cases, it's kind of obvious'
The survey’s findings don’t surprise Regenstein, a member of ShelfLifeAdvice.com board of advisers. Many consumers fear that once a date is passed, the product will cause food poisoning, he says. “The dates are a guide, telling you to pay attention if you’re close or beyond it.’’

The food manufacturer generally determines the date, which marks the point when the quality of the food would deteriorate — not when it turns dangerous.

“In most cases, it’s kind of obvious when it’s spoiled,’’ Regenstein says. “Milk at some point will go bad. You pick that up with taste or smell." 

Foods that you should watch the most for spoilage? Poultry, fish and meat. “That’s where we need to look at shelf life, and watch for the expiration date more,’’ Doyle says.

Even sodas have an expiration date. Doyle says that’s a matter of diet sodas going bad because artificial sweeteners break down. Regenstein says soda will lose carbonation in plastic containers and go flat, but isn’t harmful.

Cathy Svacina of Kansas City fretted about dates on food when raising five children. When the date passed, food was dumped even if it didn’t smell or look bad.

Now Svacina, with children grown, has eased her view of ‘use by.’ Not that she doesn’t pay attention. She takes a black marker to food packages when home from the grocery store. “I mark the dates with great big numbers,’’ she says. But that’s mainly so she can rotate the oldest to the front of the pantry or refrigerator. The stuff she’ll consume past the date includes dry mixes, rice and canned food with a high acidic content.

Her fears of salmonella have subsided — replaced, she says, by another concern: “Not wasting things.’’

Andy Miller is an Atlanta-based freelance journalist. His work has been published by WebMD, AOL's WalletPop and AARP. He was a longtime staff writer at the Atlanta Journal-Constitution.

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Explainer: How far can you push it?

  • U.S. consumers unnecessarily discard billions of dollars of food a year, estimates ShelfLifeAdvice.com, the food storage reference website. The expiration date stamped on food containers marks the point when the quality will start to decline, not when the food turns dangerous. Find out how long some of the food in your kitchen will last past the Use By date.

  • Milk

    Image:Milk
    TODD PONATH  /  AP

    Milk that's properly refrigerated can be kept for several days past its Use By date, says the National Dairy Council.

  • Cereal

    Image: cereal
    Nati Harnik  /  AP

    Cereal that's stored in a cool, dry place can keep for a year past its expiration date, says Joe Regenstein, a professor of food science at Cornell University.

  • Eggs

    Image: Eggs
    Bruno Medley

    Eggs can be good for three to five weeks past the Use By date, according to ShelfLifeAdvice.com, a food storage reference website.

  • Flour, sugar, rice and cake mixes

    Dry good kept in a closed container can last indefinitely. “There’s no reason that dry goods wouldn’t be safe except if it becomes wet,’’ says Michael Doyle, director of the University of Georgia’s Center for Food Safety.

  • Canned fruit

    Eat canned fruit within 18 months of purchase, says the ShelfLifeAdvice.com, a food storage reference website.

  • Poultry, fish and meat

    Image: Raw poultry
    Paul Sakuma  /  AP file

    When it comes to poultry, fish and meat, it's best to pay attention to the Use By date and look for signs of spoilage. “That’s where we need to look at shelf life, and watch for the expiration date more,’’ says Michael Doyle, director of the University of Georgia’s Center for Food Safety.

  • Frozen pizza

    Frozen pizza can be kept in the freezer for up to two months after purchase, according to ShelfLifeAdvice.com, a food storage reference website. If it's in the refrigerator, use it within four days.

  • Mayonnaise, ketchup and mustard

    Image: Ketchup
    Keith Srakocic  /  AP

    A container of mayonnaise that's been opened can stay fresh in your refrigerator for up to two months, according to ShelfLifeAdvice.com, a food storage reference website. If it's unopened, it can last for a year in the refrigerator or two to three months in your pantry.

    Ketchup that's been opened can last up to a year in your refrigerator or a month if it's in the pantry, the website says. Unopened ketchup lasts a year in your pantry.

    Mustard that's been opened can last up to a year in your refrigerator or in your pantry. If it hasn't been opened, it'll keep up to two years in your pantry.

  • Toothpaste

    The sky is the limit when it comes to toothpaste's longevity. “I have yet to figure out what can go wrong’’ with it, says Joe Regenstein, a professor of food science at Cornell University.

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