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Why does Milk go Sour?

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posted Feb 20, 2018 by Alivia Clark

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2 Answers

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Because it's not processed and there's no additives added to it to make it last longer

answer Jul 12, 2019 by Comeback Tuesday
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Milk if not put in the refrigerator or not added with any preservative gets sour after some time because of a bacteria lactobacillus.
Milk contains harmless bacteria called lactobacillus, which uses lactose (milk sugar) for energy and creates lactic acid as a by-product. It is the lactic acid which makes milk taste sour.

answer Jul 13, 2019 by Salil Agrawal