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vitaminsHas Critical Values
Calcium
Ca· also: Calcium, Total Calcium
Clinical Overview
Calcium is essential for bone structure, muscle contraction, nerve function, and blood clotting. Abnormal calcium levels can cause severe symptoms affecting the heart and nervous system.
Reference RangesWHO/IFCC standards
| Age Group | Reference Range | Unit | Notes |
|---|---|---|---|
| Adults (18–64) | 8.5 – 10.5 | mg/dL | — |
Also reported in: mmol/L.Conversion factor: 1 mmol/L = 0.250 mg/dL.
Critical (Panic) Values
Critical Low: < 6.5 mg/dL. Critical High: > 13 mg/dL. Values outside these limits require immediate clinical attention.
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Related Topics
mineralsbonecardiachypercalcemia