Please can you help. I am a 34 yo women diagnosed with underactive thyroid nearly 2yrs ago, was started on 200mg levothyroxine & had nearly every side affect. Changed doctors who stopped levothyroxine, retested & told me that thyroid ok. As Im a vegetarian, I asked for my B12 to be tested. Plasma B12 level 424.3 ng/L (180.0-2000.0) is this range normal? Pernicious
Anemia & thyroid problems run through family.