[Alas Babylon!]

I was taking two 5000 IU tablets of D3 daily but my doctor said I should cut my intake by half—so now I only take 5000 IU once a day.

Is this enough?

[BrandtMichaels]

I’ve read where newer tests showed 5,000 upto 10,000 iu/day is OK. See my post#12 too. Was pondering if you do take too much Vit D will it have some same symptoms as sunburn?

[TTFX]

It’s more than enough. Your body deactivates most of what you take.

For a long time, people in the coldest countries took 10 micrograms per day. If you took vitamin d for many years you have stored for a long time and I think there is no reason to take more than 10 micrograms per day. The optimal blood level is 32 ng/ml.

[goodnesswins]

If your doc hasn’t ordered you tested (and the result is between 60-80), the doc is incompetent...imho

[goodnesswins]

And you need Vit K with Vit D...I take 10,000iu daily, to keep my level around 60...but I am in Northwest...EVERYONE is different.

[dennisw]

5000 IU once a day. Is this enough?

Probably.. Though, I like double that. D3 over loads are not toxic.

[catnipman]

the amount is fine, but “tablets”?

i think the best form of supplemental Vitamin D3 is derived from fish liver in the form of softgels, where the Vitamin D is dissolved in a carrier vegetable oil ...

example:

https://smile.amazon.com/BlueBonnet-Nutrition-Softgels-Skeletal-Cholecalciferol/dp/B00FXMNWA0

[ConservativeMind]

The amount we need to take is best arrived at by a blood test. I take a 5,000 IU vitamin D gelcap every other day, and with my multivitamin I am getting 3,100 IU a day. This makes my vitamin D blood test come back at 34 ng/mL, which is 85 nmols/L.

In the US, we primarily use “ng/mL.” while most countries use “nmols/L.” The conversion factor is 2.5X ng/mL = nmols/L.

It is important to get these straight. Why?

56ng/mL = 42% higher risk of death:

https://pubmed.ncbi.nlm.nih.gov/22573406/

46 ng/mL = 24% increase in cancer deaths:

https://pubmed.ncbi.nlm.nih.gov/35026158/

36+ ng/mL = 13% increase in heart attack and total death rate:

https://www.ncbi.nlm.nih.gov/pubmed/23533239

4,000+ IUs a day decreases bone density by at least 3.8% in women (blood at 53+ ng/mL):

https://jamanetwork.com/journals/jama/article-abstract/2748796
https://asbmr.onlinelibrary.wiley.com/doi/abs/10.1002/jbmr.4152

People double the times they fall at higher rates of vitamin D intake:

https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/2478897

So, we need to make sure we and our doctors are properly noting the actual measurement units from our blood tests and not seek huge amounts of vitamin D, if we don't need them.

There are problems with too much vitamin D.

A handy vitamin D unit conversion calculator:

http://www.endmemo.com/medical/unitconvert/Vitamin__D.php