There are two types of pasteurization: "low temperature, long time," in which milk is heated to 145 degrees F (63 degrees C) for at least 30 minutes*, or the more common "high temperature, short time," in which milk is heated to roughly 160 degrees F (71 degrees C) for at least 15 seconds. Many of the recycled cartons get a second life as paper products and building materials. ... Related Articles. Why does organic milk have a longer shelf life, as signified by later expiration dates, than regular milk?

The process is used for the room-temperature Parmalat milk found outside the refrigerator case and for most milk sold in Europe. A. So what is it about organic milk that makes it stay fresh so long? But some organisms that promote spoilage survive, and the milk will spoil after 14 to 21 days in the refrigerator. Special packaging, along with UHT pasteurization, is the key to shelf-stable milk. Never run out of Horizon again—just stock the pantry with shelf-stable. Organic milk lasts longer because producers use a different process to preserve it.

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The process for shelf-stable milk is called UHT pasteurization, or Ultra High Temperature. One reason is that UHT-treated milk tastes different. Ahead of that, however, was up to six days of processing and shipping, so total shelf life after pasteurization is probably up to two weeks. Number of Views 259. Milk is freshest within 5 days of opening. How do I maintain the freshness of Half & Half? Compare that to pasteurization, the standard preservation process. Horizon shelf-stable and refrigerated milk are both organic. Subscribers get more award-winning coverage of advances in science & technology. The UHT treatment, on the other hand, “is a sterilization process, which means that it kills practically all micro-organisms, both vegetative cells and spores,” Dr. Moraru said in an interview.

Organic milk typically has a longer expiration date than conventional milk. The second line is the expiration date formatted as month, day, year. Actually, it turns out that it has nothing to do with the milk being organic. But if it's the long shelf life you're after, I would recommend you buy nonorganic UHT milk and avoid being charged double. Q. Milk is pasteurized, which is a process that makes it safe to drink. With higher temperature pasteurization and special packaging, shelf-stable milk can be stored safely without refrigeration. Europeans, however, don’t seem to mind. Is my carton of milk good past the sell-by/expiration date? Retailers typically give pasteurized milk an expiration date of four to six days. (The error occurred during editing by the staff of and is not the fault of  the expert. The tastiest and most nutritious milk comes from healthy, happy cows that spend their days in green pastures. What makes shelf-stable different is how it’s pasteurized and packaged. Explore our digital archive back to 1845, including articles by more than 150 Nobel Prize winners.

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This helps eliminate bacteria and keeps out light, air and harmful contaminants.

A. Conventional milk typically has an expiration date for two weeks and sometime less.

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