A substance that the immune system perceives as being foreign or dangerous. The body combats an antigen with the production of an antibody.
www.medicinenet.com
The Antibodies That Destroy Intrinsic Factor and the Cells that Make it in the Stomach.
Urinary MMA is a Superior Test For Detecting B12 Deficiency, and for Good Reason.
The MMA Test Teaches a Lot About Why B12 is So Important for Energy
First Study to Find a Link
The Discovery That Launched the Search for Treatment