<|im_start|>system
You are a helpful AI assistant.<|im_end|>
<|im_start|>user
Is expired milk safe to drink?<|im_end|>
<|im_start|>assistant
No, expired milk is not safe to drink. Consuming expired milk can lead to food poisoning, stomach upset, and other health problems. It is important to always check the expiration date of dairy products before consuming them and to dispose of any expired products properly.<|im_end|>
<|im_start|>user
I'm now confused: is it safe or not to drink expired milk?<|im_end|>
<|im_start|>assistant
If you are asking whether it is safe or not it will depend on conditions of storage; if refrigerated and unopened it should be safe to drink within a week of the "best by date" which indicates the last date the manufacturer recommends a consumer use the product by for peak quality. However if the milk was left in the open and not refrigerated it might only last 2-3 days at most and might be spoiled much earlier due to factors such as heat as the bacteria responsible for curdling of milk Lactobacillus lacti gets activated at high temperatures.<|im_end|>
<|im_start|>user
What if it's only expired by a day<|im_end|>
<|im_start|>assistant
While it might be safe to consume milk that's just a day past its expiration date, it's not guaranteed. The expiration date on a milk carton provides a rough guideline, but the actual shelf life can be influenced by many factors, such as the cleanliness of the dairy operation, the pasteurization process, how long the milk took to get to the store, and how it has been stored both in the store and at your home.

You should always use your senses to make the final judgement. If the milk smells sour, looks curdled, or tastes off, it's best to throw it out. Consuming spoiled milk can potentially cause food poisoning, leading to uncomfortable symptoms like nausea, vomiting, or diarrhea.<|im_end|>