International Board of Certified Lactation Consultant (IBCLC) Practice Exam

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What percentage of energy needed by an infant from mature human milk is derived from fat?

The correct answer is: 50%

Mature human milk is designed to meet the nutritional needs of infants and provides a balanced source of nutrients. Approximately 50% of the energy provided by mature human milk comes from fat. Fat is essential not only for energy but also for the absorption of fat-soluble vitamins (A, D, E, and K) and for supporting brain development, as well as overall growth and development in infants. The composition of mature human milk is uniquely tailored to support a growing infant's needs, and fat plays a crucial role in this composition. The specific percentage indicates that while carbohydrates and proteins also contribute to the overall caloric intake, fat is the predominant energy source, which is a significant aspect of infant nutrition. Therefore, understanding this balance is important for lactation consultants and health care providers when advising mothers on breastfeeding and infant nutrition.