Why is Calcium (Total) High? Causes, Symptoms, and What to Do

Calcium is an essential mineral in your body that plays a crucial role in maintaining strong bones, nerve function, and muscle contraction. However, when calcium levels become too high, it can lead to a condition known as hypercalcemia. Understanding the causes, symptoms, and implications of high calcium levels can help you manage your health effectively.

What is Calcium and Why is it Important?

Calcium is a mineral found in various foods and is vital for many bodily functions. It is primarily stored in bones and teeth, providing structural support. Calcium is also essential for blood clotting, nerve transmission, and muscle function. The normal range for total calcium levels in the blood is between 8.5 to 10.5 mg/dL. When levels exceed this range, it can indicate an underlying issue that needs attention.

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Causes of High Calcium Levels

High calcium levels, or hypercalcemia, can result from several factors:

• Hyperparathyroidism: This is the most common cause, where one or more of the parathyroid glands become overactive, producing too much parathyroid hormone (PTH), which raises calcium levels.
• Cancer: Certain cancers, like breast cancer, lung cancer, and multiple myeloma, can cause high calcium levels by spreading to the bones or producing substances that affect calcium balance.
• Medications: Some medications, such as lithium and thiazide diuretics, can increase calcium levels in the blood.
• Supplements and Diet: Excessive intake of calcium or vitamin D supplements can lead to elevated calcium levels.
• Other Conditions: Diseases such as sarcoidosis or tuberculosis can increase production of active vitamin D (calcitriol) in the body, raising calcium levels.

Symptoms of High Calcium Levels

While mild hypercalcemia might not cause noticeable symptoms, more significant elevations can lead to:

• Fatigue and Weakness: Feeling unusually tired or weak.
• Nausea and Vomiting: Digestive disturbances can occur.
• Frequent Urination and Thirst: Excess calcium can lead to increased urination and thirst.
• Bone Pain and Muscle Weakness: High calcium levels can affect bone health and muscle function.
• Confusion or Memory Issues: Severe cases can impact mental clarity.

How to Read Your Calcium Test Results

When reviewing your lab results, note that the normal total calcium range is 8.5 to 10.5 mg/dL. If your calcium level is above this range, it is considered high. It's important to remember that calcium levels may be corrected for albumin if it is low, as albumin can affect calcium measurement. Always discuss your results with your healthcare provider to understand their significance in your specific context.

Frequently asked questions

What is considered a high calcium level? A calcium level above 10.5 mg/dL is considered high. Your healthcare provider may adjust this number if your albumin levels are low.

Can diet cause high calcium levels? While diet can contribute to high calcium levels, it is more commonly due to underlying medical conditions. Excessive intake of calcium or vitamin D supplements can also lead to high levels.

How is hypercalcemia diagnosed? Hypercalcemia is diagnosed through blood tests measuring calcium levels. Additional tests may be needed to determine the underlying cause.

Is high calcium dangerous? High calcium can lead to various health issues, particularly if left untreated. It can affect bone health, kidney function, and neurological function.

Can high calcium levels be treated? Yes, treatment options depend on the underlying cause and may include medications, lifestyle changes, or surgery.

When to see a doctor

If you experience symptoms such as persistent fatigue, bone pain, or confusion, and have a blood test showing calcium levels above 10.5 mg/dL, it is important to consult your healthcare provider. They can help determine the cause and appropriate treatment for your condition.

Decisions about your health should always be made in consultation with your healthcare provider.