What is considered a normal Calcium (Ca2+) level?

A normal calcium (Ca2+) level in adults typically ranges from 8.5 to 10.5 mg/dL, with many references rounding to 8-10 or sometimes given as 8-10.5 mg/dL. This range is critical for various physiological functions, including bone health, muscle contraction, and nerve transmission.

Selecting the range of 8-10 mg/dL as the correct answer aligns well with standard medical references and provides a clear indicator of what is considered normal for calcium levels in the bloodstream. Calcium levels outside of this normal range can lead to significant clinical consequences, such as hypercalcemia or hypocalcemia, which can affect numerous bodily systems. Thus, understanding where normal calcium levels lie is essential for assessing patient health and diagnosing potential conditions related to calcium metabolism.