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Q » What causes milk to sour naturally?

Timothy

30 Oct, 2025

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A » Milk sours naturally due to the action of lactic acid bacteria, which convert lactose, the sugar in milk, into lactic acid. This process lowers the pH of the milk, leading to a sour taste and thicker consistency. The bacteria are naturally present in the environment and can proliferate in milk when it is not refrigerated, accelerating the souring process.

Michael

30 Oct, 2025

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All Other Answer

A »Milk sours naturally due to the presence of lactic acid bacteria, which ferment lactose and produce lactic acid, causing the milk to curdle and turn sour. This process occurs when milk is not stored properly or is past its expiration date, allowing bacteria to grow and multiply.

David

30 Oct, 2025

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