Certified Nutrition Specialist (CNS) Practice Exam 2025 - Free CNS Practice Questions and Study Guide

Calcium plays a vital role in the formation and maintenance of bone and teeth. It is the most abundant mineral in the human body, and approximately 99% of the calcium in an adult is found in bones and teeth, providing them with strength and structure. Throughout life, calcium is essential for building and preserving bone density, which is particularly important during childhood, adolescence, and early adulthood when bone growth is at its peak.

In addition to its structural role, calcium also influences various physiological processes. While it is involved in muscle contraction and blood coagulation, its primary and most significant role is related to skeletal integrity, making it crucial for overall health. Adequate calcium intake helps prevent bone diseases such as osteoporosis. Therefore, when considering the primary function of calcium, its role in bone and teeth formation is foundational to understanding its importance in human health.