r/VitaminD | reddlx

Upper arm muscles “freeze up” randomly, feel very weak

Recently had bloodwork, my D levels are the lowest they’ve ever been. Could that contribute to this feeling in my upper arms? It feels like my upper arms freeze up. It’s very scary when it happens. It only lasts for several minutes or less.
Overall, my arms feel very weak most of the time anyway, but this is different.
Any insight would be helpful. I don’t have ferritin or B12 levels. Thank you.

u/Distinct-Equipment10 — 10 days ago

▲ 2 r/VitaminD

GP says 50nmol/L (and everything else) is normal but I feel terrible

I had poor health around 15 years ago, when I found out I was depleted in just about every vitamin and mineral going. I locked in and became really healthy, energetic and fit. Since then I’ve had kids and gone through depression and feel worse than I ever did before. My iron has been low all my life and I had an infusion in June which brought it to normal.

I’m 40 now and in early perimenopause. Have a monthly cycle but very heavy bleeding so I am likely still losing iron. Am supplementing with Thorne iron complex to maintain levels. I also had a very small fibroid 2 years ago when they checked. I read that vitamin D can help with fibroids so went digging.

Last time vitamin D was checked was August 2025, so just over a year ago, and it was 50nmol/L. As you can see in the screenshot, it’s right at the bottom end of the NHS normal and my GP said that was normal. I’m wondering if a year later it’s likely to be lower, so have ordered some high strength vitamin D3 that I was prescribed around 15 years ago - the Hux 20,000iu. Also got some K2 as it’s recommended alongside for something to do with calcium metabolism and avoiding calcification in the arteries and elsewhere.

From reading on here, 50nmol/L perhaps isnt a very normal level? Also I’m overweight so that can ‘dilute’ (for want of a better term) my levels, is that right?

I want to see if this will help me since, on paper, all my other levels seem to be fine as far as they have been tested- blood sugar, lipids, liver function, blood pressure, iron - all ok.

I think these 20,000iu are supposed to be taken weekly but I have been reading about people taking them more often for a limited time. I want to be safe but also need to start feeling better soon. I’m so deeply exhausted all the time I can barely function. Everything I do right now is by force and I only do what I absolutely have to. Which, to be fair, is quite a lot due to life circumstances at the moment.

Any guidance appreciated on whether I should be supplementing at all or if it’s unwise when I don’t actually know what my current level is.

Thank you.

u/Stunning-Brief-7244 — 10 days ago

▲ 4 r/VitaminD+1 crossposts

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.

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u/ReviewProper6391 — 9 days ago

▲ 0 r/VitaminD

For the long-timers have you noticed new benefits 1 to 2 years in supplementing?

I've been under 30 above 10 for at least 8 years.

I got it up past 9 months I felt like a 10 to 15% overall boost here and there.

Want to take a break right now tired of swallowing magnesium powder.

But will be back on the regimen in few months. Only take 5,000 a day but in beginning it was 10,000 for first month.

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u/HeadacheLife — 11 days ago

▲ 6 r/VitaminD

Weight loss and Vitamin D Targets

Last time I got my levels checked I was at 28 ng/mL. Some holistic doctors feel that blood levels should be more like 60 - 90 ng/mL. Has anyone noticed help with weight loss after reaching a certain vitamin d target-- if so, what was the blood level number? If I was up to 60 ng/mL or more would this make a difference in weight loss?

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u/QualityInevitable709 — 11 days ago

▲ 4 r/VitaminD

Blood test 13 nmol/L and lower back pain

I was advised to get a blood test after experiencing lower back pain and tightness in the hips for several months. I think it's actually been going on for around 6 months and has been getting significantly worse by the week. The consultant said it would be a good idea to check for ESR inflammatory markers.

Luckily they also carried out a bunch of other blood tests at the same time and everything came back normal except for a severe deficiency in Vitamin D. The reading for Vitamin D was 13 nmol/L which I believe is around 5 ng/ml.

I've been prescribed Colecalciferol 4000 unit tablets to take for the next 10 weeks. Just have to wait a few days for my local pharmacy to order it in and then I'll be able to start taking it daily.

I have read that a deficiency in vitamin D can cause lower back pain, as well as general tiredness, low mood, etc. all of which I have been experiencing although it feels like my lower back pain is having the biggest impact on my daily activities and quality of life.

Has anyone else experienced lower back pain with their Vitamin D deficiency, and did it improve over time?

u/AltruisticPie1544 — 10 days ago

▲ 3 r/VitaminD

Deeply Frustrated at Pediatric Dr.

Hi All!

Low levels of Vit D runs in my family- I have a SNP that impairs absorption of D and I suspect my children have this variant as well. I 💯 should have pushed this harder- but my 13 year old has been complaining of exhaustion for months (years?). She’s been on the cusp of hypothyroidism and is neurodivergent and I’ve been pushing for most testing but her levels have been “normal”. They’ve been 20-22 with supplementation of about 15,000/week. She’s been struggling with taking pills so we moved her to a gummy :/ and lo and behold she’s been dizzy, short of breath, exhausted and had shortness of breath. I finally put the pieces together last night finally and am 99% sure it’s vit D deficiency that is making her feel horrible.

I’m so frustrated because she’s been seeing a pediatric endocrinologist at a highly regarded University hospital who knows that she’s been exhausted and has seen her very borderline levels - with fairly high supplementation, and never once noted it!

I am going to buy some drops and try myself to get her levels up.

I had no idea that 100 was a reasonable goal. I was taking 10,000 a day at one point and my levels were 80 and an endocrinologist freaked out at me saying I would damage my bones.

I apologize for the rant, I’m just (again) shocked at the level of knowledge/curiosity of so many healthcare providers.

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u/SnooCats1465 — 10 days ago