Why does milk sour?

Answer 1

Answer?Milk doesn't stay good forever. It eventually sours. Perhaps your milk has soured. AnswerSometimes milk tasts funny because you'v left it for to long in your fridge.A good tip is when you open your milk keep the lid or meltal cap so when you'v finished using it put it back on, as this will keeep away micro organisoms! Also it could be the company you use or the kind off milk e.g. blue,green ort red label there allk different fat levels and ingreediants. i hope this helps!

Answer 2

Most likely if you leave it for too long in the sun it goes sour, or it's passed its sell by date. Buy fresh milk, keep it a cool place (i.e. your fridge) and throw it out once it's passed it's sell by date. If you do that, milk will not smell so bad.

Answer 3

Milk sours because of the acid inside of it. No, pasturized milk does not sour as fast becasue of the bacterium that went away in the process of pasturization.

Answer 4

Formation of lactic acid and various bacterial waste products

Answer 5

If its over a week old its probably gone bad

Answer 6

Certain plants when eaten will give a strange taste to the milk produced.

Answer 7

If it smells, weird. It's probably bad.

Answer 8

Because it's supposed to.

Answer 9

Bacteria metabolize parts of the milk.