How to Tell If Milk Is Spoiled: Key Signs to Check

Learn how to know if milk is spoiled by checking its appearance, smell, and taste to avoid foodborne illness.

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To determine if milk has spoiled, check for changes in appearance, smell, and taste. Spoiled milk often becomes thick and lumpy, with a sour odor and an off taste. If you notice any of these signs, it's best to discard the milk to avoid foodborne illness.

FAQs & Answers

  1. How long does milk last before it spoils? Milk typically lasts about 5-7 days past the sell-by date when stored properly in the refrigerator, but always check for spoilage signs.
  2. Can spoiled milk make you sick? Yes, drinking spoiled milk can cause foodborne illnesses with symptoms like stomach upset, nausea, and diarrhea.
  3. Is it safe to use milk that smells slightly sour? If milk smells even slightly sour, it's best to discard it as it indicates bacterial growth and spoilage.