Hello
My free b12 was recently tested as low but in range. I want to organise a private blood test to check for pernicious anaemia due to symptoms and family history.
My question relates to the difference between lab tests. Medichecks offers an MMA test for £127 plus £30 to get it done in a clinic. Nothing apart from mma is tested. There is 20% off so about £130
Viapath nutris does a full b12 test panel with total b12, active b12 and mma at St Thomas’s for £60.
Why would they be so different - could one be more reliable than the other?