Hi, I new to this site--hope I can ask this here. I keep seeing places where it talks about folic acid masking b12 deficiency. Does this mean it can alter serum b12 levels? I have ALL the symptoms of B12 deficiency, incl. being a vegetarian and taking metformin for 10 years. My Dr was convinced too but the serum b12 came back ">1000" (High). My folic acid is also high. I do take a multi with both.
The only thing abnormal in my labs was my TSH at 9.45. I have had Hashimoto's 15 years, medicated, but had a bad rise for some reason. I'm praying that's the cause of my terrible nerve pain. A Physiatrist diagnosed as TOS, though we haven't done an EMG or nerve cond study etc. And advice/wisdom appreciated.