Laboratory Vitamin D Levels and Description

October 24, 2010 at 3:30 pm

Several months ago I was tested for the 3 components of Vit D:

VITAMIN D, 25-OH,TOTAL, Vit. D, 25-OH D3, & Vit D, 25-OH D2.

Each number has to be looked at individually, but typically it is the “TOTAL” that will be low and need to be treated (as stated by lab below). 30-100ng/mL is considered “normal” for the TOTAL Vitamin D level, but studies show levels of 50ng/mL are best & desirable.

[COLOR=”Red”]This is the laboratory description of those 3 tests run:[/COLOR]
25-OHD3 indicates both endogenous production and supplementation.
25-OHD2 is an indicator of exogenous sources such as diet or supplementation.
[COLOR=”Red”]Therapy is based on measurement of Total 25-OHD[/COLOR], with
levels <20 ng/mL indicative of Vitamin D deficiency, while levels
between 20 ng/mL and 30 ng/mL suggest insufficiency. Optimal levels
are >=30 ng/mL.

Actually, as of the last couple months, levels of 50ng/mL are what is desired.

I was put on Rx Vitamin D 50,000IU (which is the D2 form-ergocalciferol), once per week for 12 weeks and is not available OTC.

When we re-tested at 13 weeks I was at a stable level where I could switch to OTC Vitamin D3 (cholecalciferol) 5,000IU daily.
It is important when on supplemental D vitamin to be retested so as not to go too high with a fat soluble vitamin. We will recheck again in about 6 months, now that I am hopefully on “maintenance”.

Anyone wanting to do research now (today) will find that the RDA has been recently changed to 800-1000IU/day and lots of new literature regarding the hazards of Vitamin D deficiencies and the benefits of normal levels has been released.

Before self treating with high doses though, it is important to get a laboratory test value so you & your Dr have a plan. 800-1000mg IU is generally safe/sufficient, providing one is not D deficient to start with.
Most people tested ARE deficient though, studies show.

A Google search will turn up lots of ‘new’ sources and research on the benefits of Vitamin D.

Whether you think it contributes to CIDP or not, it is something worth looking into as the changes have been great in the past year and it is good for general health, “to have one less problem”! 😀