Which of the following correctly identifies a characteristic of mature milk?

The characteristic that identifies mature milk is its more balanced ratio of whey to casein proteins. Mature milk, produced after the first few days postpartum, has a higher proportion of whey proteins compared to casein proteins, especially when compared to colostrum. This unique composition is essential for the infant's digestion and nutrient absorption, as whey proteins are easier for the baby to digest.

Moreover, the balanced ratio helps to provide a protective effect, supports growth and development, and enhances the bioavailability of nutrients. This is important at a stage when the infant is transitioning to more regular milk feeds and requires adequate nutrition for their rapidly developing body and brain.

Understanding the structure of mature milk is vital for healthcare providers to promote breastfeeding since it directly impacts maternal and infant health outcomes.