← All Biomarkers

Calcium

Mineral Unit: mg/dL

Essential mineral for bone, muscle, nerve, and cardiac function

Also known as: Ca2+,Serum Calcium,Total Calcium

Reference Ranges

Clinical Reference 8.5 – 10.5 mg/dL
Optimal Range 9.0 – 10.2 mg/dL
Critical Range < 6.5 / > 13.0 mg/dL

Corrected calcium preferred; check albumin

Related Conditions

Hyperparathyroidism High
Malignancy High
Vitamin D Toxicity High
Osteoporosis Low
Hypoparathyroidism Low
Vitamin D Deficiency Low
Rickets Low
Muscle Cramps Low

Food & Lifestyle Recommendations

🍎 Food Reduce high-calcium foods (dairy, fortified juices) and excessive vitamin D intake Dietary calcium restriction helps manage hypercalcemia
🍎 Food Increase calcium-rich foods: dairy, sardines, kale, broccoli, fortified plant milks Dietary calcium is the first-line approach for mild hypocalcemia
🏃 Exercise Weight-bearing exercise supports bone mineral density Exercise stimulates osteoblast activity and calcium deposition
💡 Other Stay well-hydrated to protect kidney function and help excrete excess calcium Hydration reduces risk of nephrolithiasis in hypercalcemia
💡 Other Ask your doctor about checking parathyroid hormone (PTH) levels PTH testing identifies hyperparathyroidism as cause
💡 Other Avoid excessive caffeine and sodium which increase urinary calcium loss Both caffeine and sodium promote calciuria

Evidence-Backed Supplements

When High

When Low

Questions to Ask Your Doctor

  • Should we check vitamin D, PTH, and magnesium to find the cause? Calcium regulation involves several markers
  • Could this be contributing to muscle cramps or bone loss? Symptoms of hypocalcemia

Upload your blood test to see how your Calcium compares to reference and optimal ranges.

Upload Blood Test