I was diagnosed in 94 with CFS, 95 with IBS and more recently with FM
I've spent 20 years feeling rough at best and downright ill at times - during my pregnancy I felt amazing.
I the last year I have been diagnosed with B12 deficiency, Zinc deficiency, Folate deficiency & Vit D deficiency; possibly due to absorption issues
Taking supplements have not made me 'better' I am not cured much to my disgust however, so far, my worst is less bad and my normal is better than it was.
If you look back on my blood tests 5/6 years I was borderline B12 deficiency even then not below the range but very low within it
There are loads of websites which 'suggest' the range is a bit arbitrary particularly for B12 and the GP had to be pressured into testing me for Vit D deficiency.
For me absorption issues 'taking a good multivitamin' wouldn't work - but there are loads of people (often women) who are tired all the time are these tests regularly done for them, is it the first set of test that are done or are they sent away with well maybe you're a bit depressed
I dunno - I just feel somehow something is a bit wrong