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Why does organic milk stay fresh longer?

The sell-by dates of most conventional milk cartons

Photo credit: AP, 2006 | The sell-by dates of most conventional milk cartons indicate they must be sold within two weeks of reaching the store's shelves; organic milk typically has up to eight weeks. The reason for the disparity lies in two differing methods of pasteurization.

Why are the expiration dates on cartons of organic milk so much farther in the future than those of conventional milk?

The sell-by dates of most conventional milk cartons indicate they must be sold within two weeks of reaching the store's shelves; organic milk typically has up to eight weeks. The reason for the disparity lies in two differing methods of pasteurization.

Pasteurization,...

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