Is it bad to eat curdled milk?
Also question is, is it safe to use curdled milk?
If the originary milk was properly pasteurized, or it's hygiene was guaranteed, then the curdled milk is not dangerous. Of course, there is a difference between curdled and spoiled… Spoiled or rotten milk is caused by microbial contamination of the milk, and it is not considered safe by human consumption.
One may also ask, is it safe to drink curdled milk in coffee? Coffee is slightly acidic, milk in coffee will curdle before it totally curdles in the carton. If you are not mistreating your milk by contaminating it with dirty utensils, drinking out of the carton or leaving it at ambient temperatures for hours, the milk will be safe to drink until the expiration date.
Also to know is, will curdled milk hurt you?
Curdled milk is basically the precipitation of casein protein due to a lowering of the solution pH. Usually this is because some bacteria acidify the milk, thus lowering the pH. If bacteria is the case, usually the ones that produce this lactic acid will do you no harm.
What happens when milk curdles?
This is what happens when milk curdles, as the pH drops and becomes more acidic, the protein (casein and others) molecules attract one another and become "curdles" floating in a solution of translucent whey. This clumping reaction happens more swiftly at warmer temperatures than it does at cold temperatures.