Parathyroid Hormone (PTH) Test

The Parathyroid Hormone (PTH) test checks the parathyroid hormone (PTH) level in blood. PTH is produced by the parathyroid glands—four tiny, pea-sized glands located in your neck. The PTH hormone acts as a messenger in the bloodstream, guiding certain cells or organs to perform specific actions. PTH’s main role is to control calcium levels in the blood. Calcium is essential for the healthy functioning of the muscles, nerves, and heart. When your blood calcium levels are too low, the parathyroid glands release PTH to restore calcium balance. PTH raises blood calcium by prompting bones to release stored calcium into the bloodstream, enhancing the intestines' ability to absorb calcium from food, and assisting the kidneys in conserving calcium, preventing its loss through urine. Once blood calcium levels return to normal, the parathyroid glands reduce PTH production, and blood PTH levels drop. With the Parathyroid Hormone (PTH) Test, you can now assess your parathyroid function and understand how well your body manages calcium levels. This information is essential for identifying any potential imbalances that may affect your bone health or kidney function.

A PTH test is needed to: Identify Parathyroid Disorders: It is commonly used to determine if parathyroid disorders are causing abnormal blood calcium levels. Evaluate Abnormal Calcium Levels: A PTH test may be necessary if you have symptoms of abnormal calcium levels in blood. Symptoms of high calcium include: Constipation Nausea Vomiting and abdominal pain Loss of appetite Increased thirst Frequent urination Kidney stones Bone, joint, and muscle weakness or pain Changes in mental health, such as depression or confusion Fatigue Symptoms of low calcium include: Dry skin Coarse hair