Calcium Test

What causes low calcium levels?

Common causes include vitamin D deficiency, underactive parathyroid glands, and certain kidney conditions — your doctor will investigate based on your specific symptoms and other test results.

What causes high calcium levels?

Overactive parathyroid glands, certain cancers, excessive vitamin D intake, and prolonged immobility are among the more common causes of elevated blood calcium.

Does eating more calcium-rich food raise my blood calcium test result?

Not significantly for most people — blood calcium is tightly regulated by hormonal systems rather than directly reflecting recent dietary intake.