Normal ALP levels can vary significantly based on age and sex. Typically, infants and young children have higher ALP levels than adults due to the active growth of their bones. For example, ALP levels in infants can range from 150 to 420 U/L, while in adolescents, the range can be from 130 to 560 U/L. It is important for healthcare providers to interpret these levels in the context of the child's age and growth patterns.
