Deficiencies can occur when you don’t get enough B-12 from your diet or when your body can’t use it properly. Typically, vitamin B-12 deficiencies can be detected through the vitamin B-12 test.
Methylmalonic acid (MMA) is a substance that is created when your body digests protein. The amount of vitamin B12 in your body controls how much MMA your body makes. A high amount of MMA typically ...
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