Cow milk is not complete food because

Solution (By Examveda Team)

Cow milk is not complete food because it is deficient in iron content.
Excessive consumption of cow's milk can lead to iron deficiency anemia caused by dietary imbalance, decreased consumption of solids, and increased consumption of an iron-deficient milk diet; Cow's milk contains predominantly non-heme iron, which is much less digestible than heme iron.