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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

#61

Post by chapium »

drgoodvibe wrote: post #25

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…

Self reporting symptoms like this is highly unreliable and subject to a variety of human faults.

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

#62

Post by TedDoesntTalk »

fizwhiz wrote: post #51
kevinmgranger wrote: post #24

Earlier quoted context omitted.

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.

I sure hope so because I've been taking half a serving of these little suckers for a while now: https://amzn.com/B001LXRWWE Here's a breakdown of the DV for some of the vitamins for a full serving: B1 = 33x (yes, 3333%) B2 = 30x B6 = 40x B12= 83x

Why would you need so much?

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

#63

Post by voisin »

randallsquared wrote: post #36
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?

My doc has had me taking 15,000 IU for four years or so. So, some other opinions.

How frequently?

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

#64

Post by randallsquared »

voisin wrote: post #63
randallsquared wrote: post #36

Earlier quoted context omitted.

My doc has had me taking 15,000 IU for four years or so. So, some other opinions.

How frequently?

Daily. Started at 5000, then 10, then 15, which is where blood work was okay.

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

#65

Post by randallsquared »

hinkley wrote: post #49
randallsquared wrote: post #36

Earlier quoted context omitted.

My doc has had me taking 15,000 IU for four years or so. So, some other opinions.

Your doctor also had you coming back for blood work yes? High doses are meant to top up your liver. Once that works your serum levels will climb and you would cut back.

He started lower, but 15K is where blood levels were normal, and they've remained steady since. Soon we'll see if 6 months of staying inside has affected things. :)

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

#66

Post by lgats »

TedDoesntTalk wrote: post #62
fizwhiz wrote: post #51

Earlier quoted context omitted.

I sure hope so because I've been taking half a serving of these little suckers for a while now: https://amzn.com/B001LXRWWE Here's a breakdown of the DV for some of the vitamins for a full serving: B1 = 33x (yes, 3333%) B2 = 30x B6 = 40x B12= 83x

Why would you need so much?

Supplement Marketing

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

#67

Post by opo »

thothamon wrote: post #59

Is this report simply saying it is possible to overdose on Vitamin-D? Isn't that possible with virtually anything?

Yea I thought that was common knowledge since at least when Paracelsus said it 500 years ago:

"All things are poison, and nothing is without poison; the dosage alone makes it so a thing is not a poison."

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

#68

Post by evo_9 »

I’ve been following this doctor for a while; he does detailed breakdowns and analyzes the available meta reviews when making recommendations: for what it’s worth K2 Mk7 (d3) is the recommended way to go.

Dr. Standfield’s video on this topic: https://m.youtube.com/watch?v=TaTsXMgS6RU

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

#69

Post by tomhoward »

Another concern with Vit D supplementation is magnesium.

As calcium and magnesium compete for absorption, Vit D’s effect of increasing calcium absorption can reduce magnesium absorption and lead to symptoms related to magnesium deficiency.

I gather the toxic effects described in the article are partly due to extreme magnesium deficiency along with other effects - though magnesium or other effects aren’t mentioned in the paper, only acute toxicity symptoms.

But it can be an issue even at much more conventional levels of Vit D supplementation, as many people are already magnesium deficient due to it being difficult to absorb from foods.

As I’ve had evidence of Mg deficiency, I’ve been taking magnesium malate for a while, but am now looking at the more absorbable forms magnesium l-threonate and magnesium bisglycinate. At times I’ve taken a supplement that combines calcium, D3, magnesium and phosphorus, to keep these nutrients in balance.

Of course one should work with a health professional when considering taking dietary supplements.

Sources:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5652077/

https://betteryou.com/health-hub/magnesium-other-vitamins-mi...

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

#70

Post by LegitShady »

voisin wrote: post #54
LegitShady wrote: post #39

Earlier quoted context omitted.

most of the supplements I've seen here are 1000ui, meaning she'd have to take 130 of the pills. It makes more sense when you realize there are liquid forms of d3 you can buy which probably make it much easier to dose really high.

In Canada at least anything over 1,000 IU in a pill needs to be prescribed (at which point I think it is an injection but I might be wrong). You’ll never find larger for sale.

You can find the liquid version though, it would make more sense than 130 pills if you were somehow convinced that was a normal dose.
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