--for high serum electrolytes, but here are many others, perhaps related to gluten and perhaps not.

First thing to check might be whether the test stood around too long--often, there is leakage of potassium/magnesium from ruptured blood cells into serum--the more time, the greater the leakage--and this skews the measured results. (The more accurate test, especially for potassium, is to measure pure plasma originally.) Also, high blood acids such as are found in diabetes and kidney dyfunction can produce elevated levels. And many medications play havoc with these ions.

But, your results are not WAY out of range--they're close enough to the reference range so that the tests should in all likelihood be repeated. A 24-hour urine test, to see how your kidneys are handling things, would probably also be a good idea.

The supplements seem innocent enough--though I was not able to determine the form of the B12 or the other B's from the links (most of us like the easier to metabolize methylcobalamin B12 rather than the cyanocobalamin in most commercial preparations, and the P-5-P coenzymated form of B6 rather than straight pyridoxine).

Where are you currently being treated (e.g., where were the tests ordered from, and through)?