The plasma measure of parathyroid hormone, which regulates calcium and bone.
Parathyroid hormone, or PTH, is made by the four small parathyroid glands in your neck. It is the main controller of calcium in the blood, working with vitamin D to keep calcium in a tight range.
This version is measured in EDTA plasma rather than serum. Plasma is often preferred because PTH is more stable in it, which can give a more reliable result when the sample cannot be processed quickly.
PTH raises blood calcium by acting on bone, the kidneys, and vitamin D activation. Measuring it shows whether the parathyroid glands are responding correctly to the body's calcium level.
A high PTH can mean overactive parathyroid glands or a response to low calcium or vitamin D. A low PTH can point to underactive glands or high calcium from another cause. It is always read together with calcium.
Aniva reads your result against research-backed ranges, not just the lab's wide normal. The reference shown below is specific to this biomarker.
Typical adult guidance for intact PTH:
| Result | Range |
|---|---|
| PTH (intact) | 1.6 to 6.9 pmol/L |
This is roughly 15 to 65 ng/L. Ranges vary by assay and lab; always read your result against the local interval and your calcium level.
PTH varies through the day and is affected by calcium and vitamin D status and by kidney function. Delays before processing can lower the result, which is one reason plasma is preferred. Some medicines and biotin supplements can interfere.
Always read alongside calcium, and usually with vitamin D and phosphate, to make sense of the result.
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