I have had MMA and B12 checked a few times. I have been getting B12 shots and then after a time they check after I had a low B12 shots were started. I am confused as to the correlation of MMA to B12. Both the MMA and B12 are low and doing the shots are making both go up but really slowly. I do have neurological symptoms so I do suspect a b12 deficiency is real but don't understand the low MMA then. Especially as when B12 goes up MMA goes up too.