What are the normal calcium levels for a healthy person?
Normal calcium levels should be between 2.25 mmol/L and 2.75 mmol/L.
Almost all calcium in the blood exists in the plasma. Therefore, blood calcium primarily refers to plasma calcium. Under the regulation and control of various factors in the body, blood calcium concentration is usually quite stable. Clinically, a blood calcium level below 2.2 mmol/L in adults is defined as hypocalcemia. This condition may be associated with causes such as hypoparathyroidism or vitamin D deficiency. Symptoms may include muscle twitching, numbness in hands and feet, dry skin, and coarse hair. A blood calcium level above 2.6 mmol/L in adults is clinically considered hypercalcemia. This may be related to conditions such as hyperparathyroidism, malignancies, or vitamin D toxicity. During illness, symptoms may include difficulty concentrating, high blood pressure, bradycardia, nausea, and vomiting.
If abnormal calcium levels are detected, it is recommended to seek medical attention promptly to maintain homeostasis of the internal environment.