What nutritional requirements does whole milk not meet for infants?

Whole milk is not an appropriate complete nutrition source for infants because it lacks sufficient vitamin C and iron, which are crucial for an infant's development.

Vitamin C is essential for growth, wound healing, and the maintenance of a healthy immune system. Infants also need iron for the development of healthy blood and to prevent anemia. Whole milk contains very low levels of both these nutrients, and relying on it as a primary source of nutrition can lead to deficiencies.

In contrast, whole milk does provide adequate calcium, vitamin D, protein, and fats, which are important for an infant's growth and development. While sodium and potassium are present, they are not the primary nutrients infants need to supplement in their diet. Thus, the lack of vitamin C and iron in whole milk is significant enough to identify it as insufficient for infants' overall nutritional requirements. Therefore, this choice reflects a critical aspect of infant nutrition.