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How Much Vitamin D Is Too Much? A Case Report and Review of the Literature

pubmed.ncbi.nlm.nih.gov

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Re: How Much Vitamin D Is Too Much? A Case Report and Review of the Literature

#21

Post by hammock »

coding123 wrote: post #18
mrfusion wrote: post #13

Can you OD on vitamin D from getting too much sun? Or does your body have a way to turn off the production? Same question but say you take a high supplement and then have a day in the sun?

In a way. If I take a lot of vitamin D in one day (like 10K UI) I typically get chills, sweats, nausea (sometimes even vomiting) and other fever like symptoms. I think it's the effect of your body turning on its fight against infection. I don't know if that's "OD"ing specifically. But I am replying because I get the exact same thing when I'm out in the sun all day long. I do feel like you probably can't get 130000 UI…

That's called sun poisoning and it's not related to Vitamin D.

Re: How Much Vitamin D Is Too Much? A Case Report and Review of the Literature

#22

Post by all_blue_chucks »

fareesh wrote: post #15

On this page it says the recommended dosage is 600 IU https://ods.od.nih.gov/factsheets/VitaminD-HealthProfessiona... Are there any other opinions?

Yes. 2000 IU and 5000 IU daily are common recommendations from medical groups in the USA.

Re: How Much Vitamin D Is Too Much? A Case Report and Review of the Literature

#23

Post by jrumbut »

hammock wrote: post #19
PragmaticPulp wrote: post #5

The title doesn’t match the abstract. This isn’t a study of the tolerable upper limit of Vitamin D intake. It’s a case report of a single individual who was taking astronomical doses of Vitamin D with disastrous consequences. It’s certainly possible to take too much vitamin D without coming anywhere near the silly doses this person was consuming. Anyone taking aggressive vitamin D doses should invest in a vitamin D t…

Everything you say is subjective (at best) or tautological (at worst) until you put a number to what you are calling a "megadose" or "excessive." "Megadose" is relative and needs to be couched with the emerging (not really, it's a decade old at least I believe) that the current official RDA of vit D is about 4-5x TOO LOW and was based on bad data (or a misinterpretation of the data).

Whether or not that's true, the article isn't talking about 4-5x the RDA.

It's talking about massive doses beyond even the most aggressive supplementation, much less a normal days intake.

Re: How Much Vitamin D Is Too Much? A Case Report and Review of the Literature

#24

Post by kevinmgranger »

PragmaticPulp wrote: post #5

The title doesn’t match the abstract. This isn’t a study of the tolerable upper limit of Vitamin D intake. It’s a case report of a single individual who was taking astronomical doses of Vitamin D with disastrous consequences. It’s certainly possible to take too much vitamin D without coming anywhere near the silly doses this person was consuming. Anyone taking aggressive vitamin D doses should invest in a vitamin D t…

Megadosing B12 (if your diet isn't already sufficient in it, which is common amongst certain vegan diets) is still a good idea, no? I recognize this might be the only exception.

Re: How Much Vitamin D Is Too Much? A Case Report and Review of the Literature

#25

Post by drgoodvibe »

I’ve had a genetic test done, after being told that I have significantly lower than average vitamin d levels it turned out I’m genetically predisposed to low vitamin d and b12 absorption. So I have to supplement significantly more than what is normal.

After doing so, my colds have been far less severe then in the past. What made me go to such lengths testing myself was that I thought I was doing everything right and yet got pneumonia two years in a row.

So aside from testing your blood serum levels you should consider a genetic test to see how well you absorb vitamin d. You may benefit from above average dosage (consult your dr. Ymmv)

Re: How Much Vitamin D Is Too Much? A Case Report and Review of the Literature

#26

Post by Supermancho »

hammock wrote: post #21
coding123 wrote: post #18

Earlier quoted context omitted.

In a way. If I take a lot of vitamin D in one day (like 10K UI) I typically get chills, sweats, nausea (sometimes even vomiting) and other fever like symptoms. I think it's the effect of your body turning on its fight against infection. I don't know if that's "OD"ing specifically. But I am replying because I get the exact same thing when I'm out in the sun all day long. I do feel like you probably can't get 130000 UI…

That's called sun poisoning and it's not related to Vitamin D.

I had not heard of sun poisoning, although I've suffered it. I've been told it was heatstroke (since no sunburn), but it felt different and indeed it is (due to medicines I take). Thanks for that tidbit.

Re: How Much Vitamin D Is Too Much? A Case Report and Review of the Literature

#27

Post by sbierwagen »

hammock wrote: post #19
PragmaticPulp wrote: post #5

The title doesn’t match the abstract. This isn’t a study of the tolerable upper limit of Vitamin D intake. It’s a case report of a single individual who was taking astronomical doses of Vitamin D with disastrous consequences. It’s certainly possible to take too much vitamin D without coming anywhere near the silly doses this person was consuming. Anyone taking aggressive vitamin D doses should invest in a vitamin D t…

Everything you say is subjective (at best) or tautological (at worst) until you put a number to what you are calling a "megadose" or "excessive." "Megadose" is relative and needs to be couched with the emerging (not really, it's a decade old at least I believe) that the current official RDA of vit D is about 4-5x TOO LOW and was based on bad data (or a misinterpretation of the data).

Fortunately, there is a link at the top of the page, which leads to the very article that OP is talking about.

Re: How Much Vitamin D Is Too Much? A Case Report and Review of the Literature

#28

Post by nostromo »

jrumbut wrote: post #23
hammock wrote: post #19

Earlier quoted context omitted.

Everything you say is subjective (at best) or tautological (at worst) until you put a number to what you are calling a "megadose" or "excessive." "Megadose" is relative and needs to be couched with the emerging (not really, it's a decade old at least I believe) that the current official RDA of vit D is about 4-5x TOO LOW and was based on bad data (or a misinterpretation of the data).

Whether or not that's true, the article isn't talking about 4-5x the RDA. It's talking about massive doses beyond even the most aggressive supplementation, much less a normal days intake.

According to the paper she was indeed taking 325 times the recommended daily dose of Vitamin D for 20 months.

The paper is indeed pretty silly. "How much is too much? Somewhere between 1x and 325x RDA apparently."

Re: How Much Vitamin D Is Too Much? A Case Report and Review of the Literature

#29

Post by valarauko »

ram_rar wrote: post #6

Taking 130,000UI per day for 20 months is insane. Most of the over the counter doses are ~ 5000UI. I'm curious, as to what was the patients diet like? Vit D is a fat soluble vitamin and its my understanding that one needs to eat healthy fats for it to be absorbed by the body.

I take a 60K softgel monthly, and I believe it has vitamin D in an oil carrier.

Re: How Much Vitamin D Is Too Much? A Case Report and Review of the Literature

#30

Post by dec0dedab0de »

hammock wrote: post #19
PragmaticPulp wrote: post #5

The title doesn’t match the abstract. This isn’t a study of the tolerable upper limit of Vitamin D intake. It’s a case report of a single individual who was taking astronomical doses of Vitamin D with disastrous consequences. It’s certainly possible to take too much vitamin D without coming anywhere near the silly doses this person was consuming. Anyone taking aggressive vitamin D doses should invest in a vitamin D t…

Everything you say is subjective (at best) or tautological (at worst) until you put a number to what you are calling a "megadose" or "excessive." "Megadose" is relative and needs to be couched with the emerging (not really, it's a decade old at least I believe) that the current official RDA of vit D is about 4-5x TOO LOW and was based on bad data (or a misinterpretation of the data).

...the current official RDA of vit D is about 4-5x TOO LOW...

The person in the study was taking 162.5x the largest recommended daily allowance.

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