If you can, do get the MMA. It will show if B12 is actually being utilized. (inactive B12 may be present in the sample and registering as a good level, but it may never get methylated and then really be able to work. ) The MMA level goes down as B12 helps metabolize it away, so a low result in this test is desirable.
Homocysteine is also a good test if you don't have to pay for it.
It will show if the 3 factors, folate, B6 (active form) and B12 are working to cycle the homocysteine. When high this substance is very irritating to blood vessels and is thought to damage them leading to atherosclerosis. But you may not need both tests if the MMA is high. That will tell you to do the DNA testing.
Part of the DNA testing is to evaluate COMT...this enzyme is involved with the methyl transfer in balancing neurotransmitters...so the DNA testing is helpful that way.
http://en.wikipedia.org/wiki/Catecho...yl_transferase
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Weezie looking at petunias 8.25.2017
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