Why is Parathyroid Hormone (PTH) Low? Causes, Symptoms, and What to Do
Learn about low parathyroid hormone (PTH) levels, their causes, symptoms, and when to consult a doctor.
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is below the typical adult range (15–65 pg/mL).
is within the typical adult range (15–65 pg/mL).
is above the typical adult range (15–65 pg/mL).
This number is very far from the usual range - check which unit your report uses.
A value this far outside the range is worth discussing with your doctor today.
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See it next to the rest of your report - upload it for a free, private explanationFree. Sign up with your email - no password, we send you a code.Parathyroid hormone (PTH) is a crucial hormone produced by the parathyroid glands, which are small glands located in the neck. PTH plays a vital role in regulating calcium levels in the blood, which is important for bone health and muscle function. A low level of PTH can lead to various health issues, making it important to understand the causes, symptoms, and implications of this condition.
What is Parathyroid Hormone (PTH)?
Parathyroid hormone (PTH) is produced by the parathyroid glands and helps regulate calcium and phosphorus levels in your blood. The typical adult range for intact PTH is 15–65 pg/mL. When PTH levels fall below this range, it can lead to an imbalance in calcium, which may affect various bodily functions.
Causes of Low PTH Levels
Low PTH levels, also known as hypoparathyroidism, can be caused by several factors:
- Surgical removal or damage: This is the most common cause of low PTH levels, often occurring after surgery on the thyroid or parathyroid glands.
- Autoimmune disease: Some autoimmune conditions can cause the body to mistakenly attack the parathyroid glands, reducing PTH production.
- Genetic disorders: Certain inherited conditions can affect the development or function of the parathyroid glands.
- Magnesium deficiency: Magnesium is important for PTH secretion, and a deficiency can result in low PTH levels.
Symptoms of Low PTH Levels
Low PTH levels can lead to a variety of symptoms, primarily due to low calcium levels in the blood:
- Muscle cramps or spasms: Often felt in the hands, feet, or face.
- Tingling or numbness: Commonly occurs around the mouth or in the fingers and toes.
- Fatigue: A general feeling of tiredness or weakness.
- Dry skin or brittle nails: Due to decreased calcium.
Diagnosing Low PTH Levels
Low PTH levels are diagnosed through blood tests that measure the concentration of PTH in the blood. A typical adult range for PTH is 15–65 pg/mL (intact PTH assay). If your PTH levels are below this range, further tests may be needed to determine the underlying cause.
Frequently Asked Questions
What is the role of calcium in relation to PTH? PTH helps regulate calcium levels by increasing calcium absorption in the intestines, decreasing calcium excretion in the urine, and releasing calcium from bones.
Can low PTH levels be treated? Yes, treatment typically involves calcium and vitamin D supplements to maintain normal calcium levels, and in some cases, synthetic PTH might be prescribed.
Is low PTH the same as low calcium? No, but low PTH levels can lead to low calcium levels. Both conditions need to be monitored and managed appropriately.
When to see a doctor
If you experience symptoms such as persistent muscle cramps, tingling sensations, or unusual fatigue, it is important to consult a healthcare provider. They can conduct appropriate tests to determine if low PTH levels are the cause and recommend a suitable treatment plan.
Disclaimer: This article is for informational purposes only and is not a substitute for professional medical advice. Always consult your healthcare provider for guidance specific to your health.