International Board of Certified Lactation Consultant (IBCLC) Practice Exam

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Approximately how much energy does human milk lactose provide to a baby's needs?

The correct answer is: 40%

Human milk lactose plays a significant role in meeting a baby's energy requirements. It is a carbohydrate that not only provides a source of energy but also supports the growth of beneficial bacteria in the infant's gut. Approximately 40% of the energy needed for an infant's growth and development is derived from lactose in human milk. This makes lactose a crucial component of human milk, as it sustains energy levels necessary for various physiological processes, including developing the brain and other organs. Lactose helps in calcium absorption, which is important for bone development, and plays a role in the creation of vital communication systems within the body. Furthermore, the high lactose content in human milk is unmatched by any other milk source, making it uniquely suited for the nutritional needs of infants. Thus, understanding the proportion of calories provided by lactose can help caregivers ensure that infants receive an optimal diet for their rapid growth and development.