Hi , I’ve just had some blood taken and they are going to check for Intrinsic Factor. I had been supplementing daily with 5000 ug Methylcobalamin but stopped two weeks prior to test.
I may have got this wrong, but I thought the GP said that if the lab saw “normal” levels of B12 in my blood (I.e. anything above 180), they might not do the test. Given that I’ve been supplementing for over a year, I would imagine this is going to be the case.
Leaving aside any skewing of results by the supplements, I was just wondering is it possible to have an IF problem with “normal” serum B12 problems, in other words you have B12 in your blood but it hasn’t got the Intrinsic Factor to process it properly?