Why do certain foods require refrigeration?

Refrigeration slows bacterial growth. Bacteria exist everywhere in nature. They are in the soil, air, water, and the foods we eat. When they have nutrients (food), moisture, and favorable temperatures, they grow rapidly, increasing in numbers to the point where some types of bacteria can cause illness.

Why do some foods not need to be refrigerated?

While certain things simply taste better and maintain a better texture when they’re kept out of the cold, other foods actually maintain more of their nutrients when left out. Cold air can break down the antioxidants in certain fruits and stop the ripening process of others, for example.

What happens if you don’t refrigerate preserves after opening?

Your jam and jelly that will last approximately 30 days after opening without refrigeration will last 6 months to a year if refrigerated. That means if you eat a lot of jam or jelly or other preserved fruit products, it would be fine to just leave them on the table, kitchen counter, or cabinet after they are opened.

Why are left over foods kept in a refrigerator?

The fundamental reason for having a refrigerator is to keep food cold. Cold temperatures help food stay fresh longer. The basic idea behind refrigeration is to slow down the activity of bacteria (which all food contains) so that it takes longer for the bacteria to spoil the food.

What foods need to be refrigerated after opening?

10 Foods To Refrigerate After Opening

• Nuts and Seeds. Photo, Erik Putz.
• Maple Syrup. Photo, Erik putz.
• Whole Grain Flour. White flour can last in the pantry much longer than whole wheat flour—up to two years.
• Natural Peanut Butter. Photo, Roberto Caruso.
• Soy Sauce. Kikkoman Soy Sauce.
• Fresh Corn.
• Ketchup.
• Tortillas.

Does cheese need to be refrigerated?

Soft cheeses such as cream cheese, cottage cheese, shredded cheeses, and goat cheese must be refrigerated for safety. As a general rule, hard cheeses such as cheddar, processed cheeses (American), and both block and grated Parmesan do not require refrigeration for safety, but they will last longer if kept refrigerated.

What fruits and vegetables don’t need refrigeration?

1. Vegetables That Don’t Need Refrigeration

• Onions. Eat them raw, grill or sautee them.
• Tomatoes.
• Carrots.
• Potatoes.
• Avocados.
• Bell peppers.
• Broccoli and asparagus can last 2-4 days without refrigeration.
• Cucumber and zucchini can also last about 2-4 days without refrigeration.

Do you need to keep marmalade in the fridge?

Surprisingly, jam and marmalade is best stored in the kitchen cupboard, not in the fridge. This is because, thanks to its fruit content, it is naturally acidic and therefore less likely to grow any unwanted bacteria.

Why are fruits and vegetables kept in cold storage?

As soon as fresh produce is harvested, it begins to deteriorate and dangerous bacteria will start to develop. The low temperatures inside cold storage units halt the growth of these pathogenic fungi, ensuring that spoilage of fruits and vegetables is kept to a minimum.

Do you really need to refrigerate after opening?

Cooling the food product to a temperature just above freezing in a refrigerator is generally required to slow the growth of these organisms. This cooling can permit foods to remain safely edible for up to two weeks after opening. This seal is extremely important to the safe preservation of the food product.

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