I think you should start with B12 and Vit D tests.
These two nutrients can become very low in people with chronic illness. (and especially in vegetarians)
Vegetarians can also become low in certain amino acids like methionine, which is a precursor to SAMe in the body.
Long term use of steroids also disrupt electrolytes...
potassium and magnesium. If you don't eat whole foods commonly you could be low in both of these too.
People who autoimmune disease may also have Gluten intolerance, so I'd get some tests for that too. If you have this, there can be significant malabsorption of any nutrients you do get in your food. It is like a vicious circle.
You can read more about this and testing here:
http://jccglutenfree.googlepages.com/
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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