Hi Osteo: Unfortunately nothing I've done has solved this Ca prob. When I was taking 1500 mg of supplemental Ca plus getting dietary Ca my total Ca was normal. When you read my Ca intake, you need to keep in mind that those figures don't represent total elemental Ca. Depending on what type of Ca you're taking the elemental value changes. Look at the link below that explains elemental Ca, and you'll see what I'm talking about, so I actually wasn't getting as much as 1500 + dietary totals.
I went to an Endo, for other reasons, and he ran an ionized Ca and it came back at 1/10th of a point out of the normal range, the first time. I personally didn't think much of it because it was barely out of range, and I wondered how accurate the reference ranges are, since they vary from city to city, and lab to lab. I also know that 10% of the population will "naturally" fall outside of reference ranges anyway. I don't know what to tell you on which test is better, total or ionized, but they usually don't do ionized unless you have some other medical problem that would precipitate the running of that test, or if you were getting ready for surgery.
I went off of all supplemental and dietary Ca and the ionized count stayed the same, and the other 2 stayed at normal. This all occured "before" I started taking Forteo. Since my urinary Ca and total Ca was always normal I decided to go on Forteo anyway. Just to be sure that the Forteo wasn't causing this after it was first noticed pre Forteo, they took me off of it for a month and ran the tests again, and all the counts stayed the same. Since stopping dietary Ca didn't work, I continued to eat the things I find hard to give up that have Ca, and it hasn't made any difference anyway.
I can't tell you what this means, and neither can the Drs I've seen. The normal things to check for elevated Ca were done and are still being done, and so far they can't find any cancer, sarcoidosis, etc. Because my PTH is normal I can't get anyone to order a parathyroid scan, so I can't say I have hPTH. I am having another test done in a week or so for PTHrp and will have to wait for those results. I'm waiting to get in to see another specialist at LLU, and I don't have the date yet. I've been told the wait to see him (Endo PhD) is long.
Maybe if you read some of the others posts on hyperparathyroid disorder the calcium question may be answered there. One thing I know is that no one will treat my situation as an emergency until my count goes above 8 (ionized) and my highest count was 5.7 (normal 4.5-5.6) depending on the lab. Frankly, I'm not going to worry about it too much unless I develope more hypercalcemic symptoms, I've got enough on my plate already

I will continue to follow up on this, but not get stressed out over it.
[url]http://www.mayoclinic.com/health/calcium-supplements/AN00964[/url]
When you cut your Ca intake by 1/3 did it lower your count for any
significant time?
Sorry I couldn't give you a good answer