What mineral is important for normal growth and development?

Zinc is crucial for normal growth and development due to its role in various biological processes. It is a key component of numerous enzymes and proteins that are essential for cellular division and differentiation, which are fundamental to growth, particularly during childhood and adolescence. Zinc is also vital for immune function, DNA synthesis, and protein synthesis, all of which contribute to overall development and health. Moreover, a deficiency in zinc can lead to growth retardation, delayed sexual maturation, and other developmental issues, underscoring its importance in the diet, especially for growing individuals.

While iron, magnesium, and calcium are also important minerals for various bodily functions—such as oxygen transport, muscle function, and bone health, respectively—they do not play as direct a role as zinc in the specific context of growth and developmental processes. Hence, zinc is identified as the most critical mineral concerning normal growth and development.