food expiration dates

Every house has food in the pantry that has been there for weeks if not months, but according to food experts, you may want to think twice before throwing those items out. Many common food products last far longer than you might think.

"We throw out tons of food each year in this country because people don't understand how long they can keep things," said Jo-Ann Heslin, a certified nutritionist and author of The Complete Food Counter.

As Heslin and other nutritionists explain, consumers generally assume that foods should not be eaten after the use-by date on the package, but in reality, this date simply indicates the period of time when the food tastes best, not the date when it will suddenly make you sick.

The general recipe for longevity, according to these experts, is for the food to be low in liquids, sugar and oil, all of which have the potential to mold and spoil the food, or to have "lots and lots" of preservatives, which keep the food fresh longer.

So if you're looking for groceries to buy in bulk and store in your pantry, these products are your best bet.

Canned food, by definition, lasts longer than most products in the grocery store because it has been specially processed in air-tight cans. In general, canned items can stay good for 12-18 months, according to Gans, but some last even longer. Canned products like beans and vegetables, which are low in acid, can actually last for as long as two to five years. The only exception is if the can is dented or rusty, as that indicates the can has been punctured at some point, which speeds up the spoilage process.