When blood is tested to assess vitamin D status, what is actually measured is the metabolically active 25-hydroxyvitamin D form of the vitamin in the blood serum.
Vitamin D3 (cholecalciferol) is considered more natural and is what is produced by your body when exposed to sunlight. D2 is what is added to foods such as milk and is not quite as easily assimilated by the body.
Don’t worry about
the different kinds of tests or what your D2 or D3 levels are, the name of the game is to get 25-hydroxyvitamin D levels to the optimal range, between 40 and 60 ng/mL. Get it measured during your next blood work or cholesterol test. Vitamin D is one of the few vitamins where it is possible to overdose. But with regular monitoring you will most likely find that your have to supplement regularly to keep your blood levels up, especially after a long winter indoors away from the sunlight.
I get tested by LabCorp for about
$35.00. If you have insurance your doctor will probably prescribe a test thru Quest Diagnostics for about
the same price. Quest Diagnostics needs to clean up their procedures for measuring Vitamin D. Quest's numbers are usually too high. For example a reading of 40 from LabCorp, ARUP, or Clinical Pathology will show up in a Quest reading of about
48 or so.
I am not a doctor, and don't have the right to contradict one, but Dr. Zaidi's 10,000 IU of vitamin D may be in the range that will eventually produce an overdose, which can cause problems. Testing your blood levels is important.
Interesting that Flagyl was ineffective for him while Flagyl was what jump started my remission. Everyone IS different.
Post Edited (BabeintheWoods) : 7/8/2010 8:11:20 PM (GMT-6)