As a food safety expert with years of experience in the field, I can provide you with several indicators to determine if milk has gone bad. It's important to note that consuming spoiled milk can lead to foodborne illnesses, so it's crucial to be able to identify when milk is no longer safe to consume.

Here are some key signs that milk has spoiled:


1. Expiration Date: Always check the expiration date on the carton. If the milk is past its expiration date, it's best to discard it.

2. Odor: Spoiled milk often has a sour or unpleasant smell. If the milk smells off, it's likely spoiled.

3. Texture: Curdled milk is a clear sign that it has gone bad. This happens when the proteins in the milk separate and form lumps.

4. Color: Milk that has turned yellow or has developed any other unusual color is a sign of spoilage.

5. Taste: If the milk tastes sour, bitter, or just off, it's probably spoiled.

6. Mold: Visible mold on the surface of the milk is a clear indication that it is no longer safe to consume.

Remember, when in doubt, it's better to be safe than sorry. If you suspect that the milk has gone bad, it's best to discard it.

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The smell of sour milk is overpoweringly wretched. My belief is that if you can stand to smell it, you can stand to drink it. BEST WAY IS: Pour a small amount of milk into a cup of hot water, the milk will rise/float to the top in small, thin clumps if it is bad.read more >>