What is the primary characteristic of mature milk?

• A. It is high in sugar
• B. It is 90% water
• C. It contains no vitamins
• D. It is low in calories

Answer: (B)

Mature milk, which is the milk produced after the initial colostrum and transitional milk phases, is primarily characterized by its high water content, around 90%. This high water content helps keep the infant hydrated, especially since breast milk not only serves as a source of nutrition but also meets the hydration needs of a growing baby. The presence of water in mature milk is essential for the infant’s development and overall health, allowing them to absorb the nutrients and energy provided by the milk effectively.

While mature milk does contain sugar (primarily lactose) and essential vitamins, describing it as having "no vitamins" is incorrect as mature milk is an important source of various vitamins and minerals necessary for growth. Additionally, mature milk is not low in calories; rather, it provides a good balance of calories, fats, proteins, and carbohydrates to support the baby's needs. Therefore, the characteristic of being 90% water accurately reflects mature milk's primary nature and its role in infant nourishment.