Is my carton of milk good past the sell-by/expiration date? Our single-serve milk boxes are also shelf-stable, so you can store them in the pantry and take them anywhere—for lunches, for travel, at sports practice or to the park. Why does organic milk have a longer shelf life, as signified by later expiration dates, than regular milk? How do I maintain the freshness of Half & Half? So why isn’t all milk produced using UHT? According to Organic Valley[1], they use two forms of pasteurization for their milk. *Correction (6/6/08): This sentence originally said "milk is heated to 145 degrees F (63 degrees C) for at least 30 seconds." What is the best way to store Organic Valley Butter? The second line is the expiration date formatted as month, day, year. Q. There are, of course, lots of reasons people buy organic milk. It’s real milk you can store in the pantry, thanks to airtight, no-light packaging. All "organic" means is that the farm the milk comes from does not use antibiotics to fight infections in cows or hormones to stimulate more milk production. According to the Northeast Organic Dairy Producers Alliance, the milk needs to stay fresh longer because organic products often have to travel farther to reach store shelves since it is not produced throughout the country. Actually, it turns out that it has nothing to do with the milk being organic. What makes shelf-stable different is how it’s pasteurized and packaged. Our shelf-stable milk gets ultra-pasteurized at higher temperatures (UHT), and then put into Tetra Pak packaging. 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. Craig Baumrucker, professor of animal nutrition and physiology at Pennsylvania State University, pours out an answer: If you’ve ever shopped for milk, you’ve no doubt noticed what our questioner has: While regular milk expires within about a week or sooner, organic milk lasts much longer—as long as a month. This article explains what the date on your milk means and how long milk is safe to drink after the printed date. With higher temperature pasteurization and special packaging, shelf-stable milk can be stored safely without refrigeration. We do not recommend consuming any milk products past the sell-by date. The process is used for the room-temperature Parmalat milk found outside the refrigerator case and for most milk sold in Europe. UHT, on the other hand, kills everything. Subscribers get more award-winning coverage of advances in science & technology. Why does organic milk have a longer shelf life, as signified by later expiration dates, than regular milk? © 2020 Scientific American, a Division of Springer Nature America, Inc. Support our award-winning coverage of advances in science & technology. Never run out of Horizon again—just stock the pantry with shelf-stable. Organic Valley farmers helped write the standards on organic pastures—and every day, we work to exceed those standards. Milk with either treatment lasts about five days after the container is opened.
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