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Low vitamin D

26 replies

Yourinmyspot · 05/03/2025 16:11

I’ve just had a few blood tests done by the hospital and it came back that my vitamin D is low at 23. I take 800iu (20 micrograms) of vitamin D3 daily as prescribed by my GP. I was put in them around three years ago when my level was 33 but it’s dropped since then. I try and eat foods containing vitamin D but have to be careful in the sun due to a couple of medications I’m on as I burn very quickly and can have reactions.

Is there anything else I can do to get my levels up?

OP posts:
dementedpixie · 05/03/2025 17:57

You can take up to 100ug or 4000IU per day
Did you not get a higher dose prescribed?

FormerlyPathologicallyHappy · 05/03/2025 17:59

Some beauty salons do vit d injection.

Conanno · 05/03/2025 18:00

take a higher dosage, you can get higher at Holland and Barrett, I’ve got a high dose one I take once a week from iHerb

LittleGreenDragons · 05/03/2025 18:09

Vitamin D needs to be taken with Vitamin K as it helps with better absorption.

800 is very low considering the NHS recommends even healthy people should take 1,000 during the winter months. You can take up to 5,000 otc.

EDIT - to put this in perspective when I was very low i was prescribed 50,000 to be taken once a week for a couple of months. 800 is nothing.

Techno56 · 05/03/2025 18:17

You can get drops with K2 that are apparently better abdorbed

SleepDeprivedButAlive · 05/03/2025 18:18

800 is too low. Get the 3/4000 ones.

HolySchmokes · 05/03/2025 18:19

I take 4000iu a day.

you need to get out in the sun. 20 minutes in the morning and 20 minutes in the afternoon. You won’t burn.

LavenderBlue19 · 05/03/2025 18:22

You need a much higher dose, I'm prone to low vitamin D and I take 4000iu every day (ish) October to April and every few days through summer.

OldChairMan · 05/03/2025 18:23

Your doctor should prescribe you a large loading dose as you are deficient. It will be a lot more than any you buy in a shop, as a pp has said. The hospital would normally write to your GP with the results and your GP would ask you to book an appointment.

floppybit · 05/03/2025 18:51

It's all about absorption rather than taking higher and higher doses. Google 'vitamin D cofactors'. You at least need to take vitamin K2 with it, but you might want to add some of the other supplements which help with absorption.

TheSpottedZebra · 05/03/2025 18:52

HolySchmokes · 05/03/2025 18:19

I take 4000iu a day.

you need to get out in the sun. 20 minutes in the morning and 20 minutes in the afternoon. You won’t burn.

Well, she might. I do.

I'm very pale, always burnt easily and now I take a medication that makes me extra photo-reactive. OP said she takes a medication that does the same.

@Yourinmyspot , that is not an especially high low dose. Even the one from Aldi is 25 micrograms per tablet! I take 2 of these per day, but this is also possibly not enough for me.

HolySchmokes · 05/03/2025 18:54

I’m impressed if you burn in 20 minutes of U.K. sunshine at 9am! That’s scary!

MakkaPakkasCave · 05/03/2025 18:55

If you’re obese and/or older, then you need to be on a much higher daily dose. Something like 4000iu. The UK’s recommended dosage is much lower than many other countries.

stayathomer · 05/03/2025 18:57

Talk to your doctor before you up it if they’ve found it to be very low- my mum had issues with her absorption and dealt with it by taking a high concentration and was really sick. They had to change all of her usual medications and told her to get off all vitamin d supplements

bestimitation · 05/03/2025 19:10

That's a really low dose when you were already known to be deficient. I take these through the UK winter - and a multivitamin all year. As others have said the vitamin K is important.

https://amzn.eu/d/3rAQ35k

Those are 5 x the dose you have been taking and 4000IU (100micrograms) is the max recommended to not risk excess. The tablets are tiny I was surprised how small a year pack is. Also have magnesium and they are huge.

It's £10 but that's for a full year's supply. Makes a noticeable difference to aches and pains.

Yourinmyspot · 05/03/2025 19:39

Thanks for all the advice, the hospital are going to write to my GP but from experience this could take ages. I will buy some higher strength ones. I really have to be careful in the sun as I’m on two different types of medication that I can have (and have had), bad sun reactions.

OP posts:
Firefly1987 · 06/03/2025 04:31

I was on 800iu in a multivitamin and still got aches and pains. I figured out it was a vitamin D deficiency and started taking much higher doses. Be careful doing that though as I ended up getting heart palpitations and crazy anxiety. Turns out I had depleted my magnesium stores. So do read up on what you might need to take with it (as vitamins/minerals can deplete each other) K2 has been mentioned as well. My vitamin D levels were optimal when tested shortly afterwards tho so I guess the supplements worked in a short time frame.

As for other little things you can do-Engevita make vitamin D flakes you can sprinkle on your meals. Might not do much but can't hurt!

CrotchetyQuaver · 06/03/2025 05:53

I take daily 10000 IU in winter cutting down to 5000 IU I summer. Only thing I know is wrong with me is an under active thyroid which I had to get diagnosed privately. Im outside working several hours a day all year round too. My level has slowly risen over the past 10 years on such large doses from 50 to 90. I take it with vit K2 and think magnesium's also good to take as well but I don't.

I think you could up your dosage significantly based on my own experience

LittleGreenDragons · 07/03/2025 16:12

@Firefly1987 could you explain a little more about the magnesium depletion please?

Firefly1987 · 07/03/2025 21:46

@LittleGreenDragons so vitamin D needs magnesium to work and if you are taking high doses of vitamin D you can quickly get low on magnesium if you're not taking that as well. Things like heart palpitations are a symptom so when I started getting those for the first time I was quickly able to realise it was the vitamin D causing a magnesium deficiency.

I'm rubbish at explaining the science behind this sort of stuff so I found some articles that explain how it all works-

https://pubmed.ncbi.nlm.nih.gov/28471760/#:~:text=Mg%20is%20essential%20in%20the,aspect%20of%20vitamin%20D%20therapy.

https://www.goodrx.com/well-being/supplements-herbs/vitamin-d-and-magnesium

LittleGreenDragons · 08/03/2025 17:19

@Firefly1987 thank you for that. It seems I need to add magnesium to my daily stash considering I'm on high Vit D/K as I'm unable to tolerate sunlight.

HoldingThePoisonDown · 08/03/2025 17:28

Op what do you have when you take your vitamin D?

If taken with fat it significantly enhances absorption, so nuts, seeds, full fat yogurt etc would be ideal.

angelspike · 08/03/2025 17:32

HolySchmokes · 05/03/2025 18:54

I’m impressed if you burn in 20 minutes of U.K. sunshine at 9am! That’s scary!

I'm a redhead, I'm lucky if I can put the bins out without burning
Also vitamin d deficient funnily
I take 4000IU daily

Have burned at 10am before and in full midday sun I last about 5 mins before I need to go in unless I have factor 50 on

Oblomov25 · 08/03/2025 17:47

Rheumatology consultant gave me 50,000 tablet a week.

Firefly1987 · 08/03/2025 19:18

LittleGreenDragons · 08/03/2025 17:19

@Firefly1987 thank you for that. It seems I need to add magnesium to my daily stash considering I'm on high Vit D/K as I'm unable to tolerate sunlight.

You're welcome and yeah definitely look into it. There are quite a few types of magnesium and some absorb better than others and have less side effects. Magnesium glycinate seems to be one of the most popular-good absorption and well tolerated by most people.

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