I don't have much time now to go in depth with you.

But quickly:

Low copper levels lead to anemia. I am not sure about white blood cells. Some zinc supplements contain copper as insurance. The best one here in US is OptiZinc. That is what you should be using.

B6 IS stored for short periods of time in muscle cells. As pyridoxal it is important for muscle metabolism. Since you lift weights, this would be likely for you.

The "normal" lab ranges for vitamins were NOT made for people using supplements.
Here is my B6 thread: please read it.

It might be best to get more reliable testing, INTRAcellular testing by a place like Spectracell.
http://www.spectracell.com/


Your magnesium is important. You need a chelated form, not Oxide which is most common in supplements.

This is my magnesium thread:
http://neurotalk.psychcentral.com/thread1138.html

Vit D is critical. If you are low in this, you cannot absorb calcium properly or utilize it; There are paresthesias when calcium/magnesium ratios are not normal.
Here is more information:
http://neurotalk.psychcentral.com/thread92116.html

It is unusual for a male your age to have osteopenia. This implies some calcium/magnesium shortage, and/or some low testosterone levels, or poor Vit D3 status. (testosterone helps with bone density in males). It might be useful to get tested for this.
http://www.ianabolicsteroids.com/blo...openia-in-men/

One thing you must look at is the thyroid problem. Thyroid disease can cause PNs . (this was my initial cause when I was about 30 yrs old)

Another is a dietary intolerance to gluten. This also causes PNs and other confusing symptoms with malabsorption etc.
The Gluten File is a collection of medical papers illustrating many disorders that are connected to gluten intolerance including PN.
http://neurotalk.psychcentral.com/thread1872.html

You have alot of data to wade thru from your tests. I suggest you read up here at your leisure, and see how every sifts out for you. Don't expect regular doctors to know this stuff. They typically don't.