Hi
Newley diagnosed and trying to figure things out.
Looking at recent blood test results I am confused about tpo range.
Mine tpo is 42 and the range is listed as 0-50. But everywhere I read it is listed it should be below 35?
Does this mean I have active antibodies or am I ok?
Planning to speak to doctor about this next week but wanted to get more info. Don't want to look silly if it is actually all ok.
Thanks 
With your range your TPO result is negative (although high in range).
You can only use the range that comes with your result, you can't mix and match with a range from a different lab.
Absolutely right.
With antibodies such as TPOab and TGab, the ranges vary wildly.
With a result of 42 and a range of 0-50, you could divide by 50, and read it as 0.84 in a range of 0-1. And that is what some labs do - they scale it to a convenient number.
As SeasideSusie says you are negative for Hashimotos as you are within the laboratory range. As you are high in range it would be worth re-testing in 5 or 6 months time to find out if still the same or any change.
Definitely get GP to test vitamin D, folate, ferritin and B12 soon
You might look at gluten free diet, it might help keep antibodies low
Definitely worth a retest, as this is a test that can have false negatives - antibodies rise and fall, so they may have got you on a low antibody day and you may get a different result on a retest.
Help understanding ranges and T3
Hashimotos - TPO figure - do I or don't I have it?
Rapidly rising TPO Antibodies, should I be worried?
FT3 low in range. How do I help GP understand this could be the cause of some of my symptoms?
Can TSH be in range but be positive for TPO antibodies?
