Thanks for sharing that info. Do you have a ballpark figure of how much it is to test for blood Vit. D levels?
I do a finger-stick blood draw at home, using a kit from ZRT Labs that costs about $70 with postage. If you go to Dr. Cannell’s site to order it, he gets a cut, which is a good thing because he’s probably doing more than anyone to sort through all the old and the more recent studies and then updating everyone on the results.
Here’s the link to his site page with the test: http://www.zrtlab.com/vitamindcouncil/
There’s also a ton of info on his site, including his specific advice to avoid getting your D3 in the form of cod liver oil. The vitamin A in the form of retinol in cod liver oil will frustrate the uptake of the D3, he says.
Someone said they take 10-20,000 per day. Unless you weigh 300-400 pounds or more, you’d better get tested a few times to make sure you’re not heading into the 150-200 ng/ml level that would constitute overdosing. We don’t excrete the excess vitamin D3, like we do with water soluble vitamins. It just builds up in the fat tissue and can get too high.
It should only cost $35-$50....