Once opened...yes.
Soy milk must be consumed the moment it is opened. It should be kept for more than a day.
Never. Cows never have colosseum in their milk.
Store opened flax milk cartons in the refrigerator for seven days.
about an hour or two.
A cow will never dry up if you keep milking her. That's the bottom line.
As long as you keep it dry, powdered milk lasts forever. Pasteurized will spoil.
It gets invaded by bacteria.
4 hours after it reaches room temperature.
It does if you keep it long enough!
Soy milk does spoil and turn sour after the carton is opened.
Fresh milk and any sterilized or tinned milk once it has been opened.