Hormone & Endocrine - Bloody Good
Hormone

Parathyroid Hormone (PTH)

Concerned about your calcium levels or bone strength? Parathyroid hormone keeps calcium, phosphate, and vitamin D in balance so your bones, muscles, and nerves work the way they should. This test may help check if your parathyroid glands are doing their job and can be useful if you’re experiencing low bone density, kidney stones, or unexplained muscle weakness.

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Parathyroid Hormone (PTH)

Experiencing bone discomfort, calcium imbalances, or kidney stones and want assessment of parathyroid function and calcium regulation for optimal bone health?

Overview

Your parathyroid hormone (PTH) test measures a crucial hormone that acts like your body's calcium thermostat, constantly fine-tuning calcium levels to keep your bones strong, muscles working properly, and nerves firing correctly. Four tiny parathyroid glands behind your thyroid produce this hormone, which orchestrates a delicate dance between your bones, kidneys, and intestines to maintain just the right amount of calcium in your bloodstream—not too much, not too little.

When PTH levels are off, it often signals problems with your parathyroid glands, calcium balance, or bone health, which can manifest as symptoms like unexplained fatigue, muscle weakness, bone pain, kidney stones, or even mood changes. This test is particularly valuable if you're experiencing these symptoms, have abnormal calcium levels, deal with recurring kidney stones, or have been diagnosed with osteoporosis, as it helps your healthcare provider pinpoint whether your calcium regulation system is functioning properly and determine the best path forward for treatment.

Reviewed by Dr. Vu Tran
Bloody Good’s Chief Medical Officer

Symptoms

You may benefit from this test if you experience:
Bone pain or deep aching Fractures with minimal trauma Muscle weakness in arms or legs Feeling tired all the time Feeling sad or down most of the time Difficulty concentrating on tasks

Purpose

Essential for individuals with calcium abnormalities, bone disorders, parathyroid symptoms, or anyone needing comprehensive calcium metabolism and bone health assessment.

How to prepare

No special preparation required. Inform healthcare provider of all medications, calcium supplements, and vitamin D that might affect PTH levels and calcium metabolism.

Understanding results

Results show PTH levels compared to normal ranges and must be interpreted with calcium levels. Abnormal results may indicate parathyroid disorders or calcium metabolism problems requiring further evaluation.

After the test

Address abnormal PTH through comprehensive endocrine evaluation, appropriate treatments for parathyroid or calcium disorders, dietary modifications, and regular monitoring. Work with endocrinologists as needed.

Frequently Asked Questions

  • PTH is produced by parathyroid glands and regulates calcium levels by controlling calcium absorption, bone calcium release, and kidney calcium retention.
  • High PTH may indicate hyperparathyroidism, vitamin D deficiency, kidney disease, or calcium malabsorption, requiring evaluation to determine the underlying cause.
  • Low PTH may indicate hypoparathyroidism, magnesium deficiency, or certain genetic conditions affecting parathyroid gland function.
  • PTH and calcium have an inverse relationship; when calcium is low, PTH increases to raise calcium levels, and when calcium is high, PTH decreases.
  • Causes include parathyroid gland tumors, genetic conditions, autoimmune diseases, surgery affecting parathyroid glands, and certain medications.
  • Treatment depends on the specific disorder and may include surgery, medications, calcium and vitamin D supplementation, and dietary modifications.
Parathyroid Hormone (PTH)

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What to expect

We want you to feel bloody good—inside and out. Regular testing isn’t just about checking your current health; it helps you spot abnormal values you might not know about.

1

Book your referral

Choose the testing that suits your goals. After ordering, you will receive your referral by email.

2

Collect your sample

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3
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View your lab results and receive a personalised review from the secure Bloody Good platform.

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