If you have ever go in for your yearly checkup with your doctor, there is no doubt that at some point you have gone through some diagnostic tools, such as blood tests, to see your nutrient and hormone levels. Many times this is a Comprehensive Wellness Panel, and will tell you information such as your red and white blood counts, lipid profile, and some minerals.
When you start to have some health symptoms, your doctor may order some other tests for further information. The idea to dig deeper is great, but many times these tests aren't looking in the right areas, or the doctors aren't using them to figure out the root causes.
For instance, if you show signs of a thyroid issue, the doctor will typically run a TSH test, and if you are lucky, they may even check for T4 and T3. However, these are only a small part of the puzzle as there are other hormones associated with the thyroid, and this still isn't incorporating the results into the big picture of the body!