Many tests are not answers in themselves. Some are just plain unreliable; some are affected by other nutrient levels, conditions, toxins, etc.; and often the same-old-tests are ordered over and over without ordering more sensitive ones, or ones that need to be evaluated along with the same-old-tests.

Unfortunately too many doctors just look at the out of "normal" range items, when an overall analysis is often needed. And more and more, there are doctors who say all is normal when one or more things are dramatically high or low.

Regarding the B12 test, it was shown unreliable decades ago. A "normal" B12 level does not rule out deficiency, but most doctors still don't know that, and even fewer knew it years ago.

rose