Severe vitamin D deficiency but calcium is near the upper end of normal and normarl low PTH Anyone with a similar experience?
I recently had some blood tests and I’m trying to understand an unusual combination of results.
My results:
25-OH Vitamin D: 6.76 ng/mL — severely deficient
Calcium: 9.8 mg/dL (8.6–10.0) — normal, but very close to the upper end
Phosphorus: 3.8 mg/dL (2.5–4.5) — normal
Magnesium: 2.2 mg/dL (1.6–2.6) — normal
So I thought my PTH must be working hard to keep my calcium level up!
But…
PTH: 9.5 (6.87–64.87) — low-normal
???!!
What I find strange is that my vitamin D is extremely low (6.76 ng/mL), yet my calcium is still near the upper end of the normal range (9.8). And it’s not due to PTH?
Where is that large amount of calcium in my blood coming from? I don’t take any supplements or regularly eat calcium-rich meals.
What I know is that severe vitamin D deficiency can lead to decreased calcium absorption and compensatory elevation of PTH (secondary hyperparathyroidism). So I’m wondering:
If my vitamin D is this low, why is my calcium still this high-normal rather than low or even mid-range? Not because of PTH? And not because of supplements?
Could there be something else maintaining my calcium at this level?
Then will I be doomed if I get vitamin D injected? (I was given 200,000 IU by injection 6 days ago.)
I’m also wondering whether my PTH being relatively low is simply because my calcium is already sufficiently high.
Anyway, I am lost. I don’t know what is happening with my body.
I’ve been suffering from dysautonomia (POTS) for more than a year and taking propranolol every day.
I try to find the root cause, but more weird results keep coming up and making me confused.
Anyone else have the same or a similar experience?
I also got the vitamin D injection 6 days ago and only recently saw the PTH result, so I’m quite scared that my calcium might become too high.
Also, not sure if it’s related, but my B12 is also low
Vitamin B12: 170 pg/mL (180–914) — low
Homocysteine: 23.5 — high
MMA: 0.13 (≤0.40) — normal
Folate: 4.12 (2.30–24.80) — normal
Not sure if any of these findings could be related, but I thought I’d mention it in case it’s relevant.