Re: 25(OH)D Test Result (!)

[Guest guest]

Hi folks:

One additional point occurs to me. My elevated 25(OH)D proves that the

supplement I am taking really does contain what it claims to contain! I

hadn't doubted it. But it is nice to see confirmation! I had mentioned

the source in a previous post.

Rodney.

--- In , " Rodney " <perspect1111@...>

wrote:

>

>

> Hi folks:

>

> Finally I have seen my 25(OH)D test result - from blood drawn 20th

> February - so now we have data from one more mouse to add to those of

> other mice reporting here.

>

> I have been conscientiously supplementing 3500 IU of vitamin D3 daily

> for many months. I probably get a few hundred IU from food sources,

and

> in the months leading up to the blood draw had, as near as makes no

> difference, zero from sunlight. So my total daily 'intake', leading to

> the 127 number, was about 4000 IU. In my case this has raised my serum

> 25(OH)D to 127 nmol/L (which is the same as 51 ng/ml). It had

> previously been in the 90s nmol/L, both after my initial prescription

of

> vitamin D2 (50,000 IU per week for twelve weeks), and after a summer

in

> which I had gotten a fair amount of sun exposure while not taking

> supplemental vitamin D (so sunlight only maintained my level in the

90s,

> it did not raise it further).

>

> I had wanted to see the test result for two reasons: first, to know if

> I should be taking more to reach an 'optimal' level, and to be sure I

> wasn't overdosing at 3500 IU daily. I had been keen to get my reading

> up to 130 nmol/L if possible.

>

> However, having spoken to someone who sounded intelligent at the lab

> where the testing procedure was actually performed - at a local

> university - I was told that this test method comes out with a

somewhat

> higher number than the current-benchmark 'DiaSorin' test procedure. I

> do not know what the numerical difference is between the two tests,

but

> possibly this result might be equivalent to 115 to 120 by DiaSorin?

>

> So my conclusion is that I am nowhere close to overdosing at 3500 IU

of

> D3 daily, and I would probably benefit from having a somewhat higher

> blood level. As someone posted here recently, perhaps 5000 IU daily

> might be considered an optimal intake. So maybe I will somewhat

> increase the frequency of popping my 50,000 IU pills. If I took three

> per month then that would raise my supplemental intake to 4920 daily.

>

> FWIW. YMMV (I.E. it is very likely there are variations between

> individuals in the effect a given intake of D3 will have on blood

> levels.)

>

> Rodney.

>