Tests for Vitamin D

- * Fact: Many countries no longer pay for more than 1 (some do not pay for even a single Vit D test) *    They feel that Vitamin D testing is not needed except for a few conditions (Rickets, etc) Japan is an exception * Fact: Vitamin D tests are not very accurate *     The best lab tests have accuracies and repeatabilities of +-5 ng *    Low cost vitamin D Blood Tests - both in lab and at home *     Many lab tests have accuracies and repeatabilities of +- 10 ng - or worse *    Vitamin D deficiency of a group - 15% to 48% * Fact: Low-cost office/home Vitamin D tests are available around the world (not US as of 2018) *     Low-cost 35 ng Y/N test by Nanospeed *    Low-cost Vitamin D testers (two yes-no tests for 11 dollars) - 2024 *    Quick, free, self test for deficiency * Fact: 3 major Vitamin D gene problems are not noticed by Vitamin D tests *     ~ 20% of people have poor Vitamin D genes *     Hint that Vit D is not getting to cells: Vit D-related diseases run in your family *     Another hint - you have one of the 40 diseases which are 2X more likely if have poor genes * Fact: A Vit D test will rarely (<1 in 1000) indicate that you are getting too much * Opinion: If only getting a single test, wait till after supplementing with Vit D *     3 months after starting maintenance dosing (wait at least 2 days after last supplement) *     or 1 month after a loading dose