Anyone with lab knowledge

 I had my one year labs done - my appointment is on Thursday but I have access to the results online. 

In December 2011, my PTH was 34. Now it's 20. The standard range according to kaiser is
15-65. I will bring it up with my doc but the drop looks suspicious and it's getting borderline low but I have no idea what the significance would be or if it's a problem. 

Any thoughts?

I have knowledge, I have knowledge!!!!
Actually I don't . . . I just wanted an excuse to reply to your post. Hahaha!!!
Sorry gurl . . . I do hope you can get some answers!!!

 Just Internet research is all I have. My calcium is low too which might go with it but I have no idea. 

A low PTH is actually desirable, because less calcium is being pulled from your bones. At one point, mine was down to 10, and 6 months later it was up to 20. The bariatric internist didn't bat eye at the low value. I also have Kaiser (No. Cal). It becomes more of a concern at higher values, because more calcium is being pulled from your bones.


Gail

It can be too much calcium or vitamin d, they will also check the phosphorus and magnesium levels. Probably should have blood test done.

Just had mine done, too. My level was 16. Was going to ask about it at my appointment on Wednesday. Here's what I had found on the Kaiser website. Maybe it'll help. Sounds like it backs up what Gail said!

A parathyroid hormone (PTH) blood test measures the level of parathyroid hormone in the blood. This test is used to help identify hyperparathyroidism or to find the cause of abnormal calcium levels. PTH controls calcium and phosphorus levels in the blood.

PTH is made by the parathyroid glands, which are four pea-sized glands that lie behind the thyroid gland. If the blood calcium level is too low, the parathyroid glands release more PTH. This causes the bones to release more calcium into the blood and reduces the amount of calcium released by the kidneys into the urine. Also, vitamin D is converted to a more active form, causing the intestines to absorb more calcium and phosphorus. If the calcium level is too high, the parathyroid glands release less PTH, and the whole process is reversed.

PTH levels that are too high or too low can cause problems with the kidneys and bones and cause changes in calcium and vitamin D levels.

Tests for calcium and phosphorus levels in the blood may be done at the same time as a PTH test.