Cows milk store bought is heavily pasteurized which the baby's stomach cannot digest. Raw cows milk is a safer chance of being a milk replacement to the baby as long as the cow does not have chemicals in her system such as antibiotics, added hormones or eats GMO grains that will be transferred to her milk.
Breast milk is only safe if the mother's diet is safe, as it is with a cows as well.
Cow’s milk contains low quantity
of some vitamins such as vitamin C, D and A than human breast milk. Also, Cow's
milk contains high amount of protein, and low amount of carbohydrates. One of
the proteins present in cow's milk is difficult for infants to digest and may
cause an allergic response making cow’s milk unsuitable for infants.
During respiration food molecules are broken down to release energy. During this process oxygen is required and not formed but Carbondioxide and water is liberated as byproduct. So the closest answers are Carbondioxide and water
