Why a homocysteine test is frequently suggested along with a MMA test for Vitamin B12 deficiency?

Homocysteine levels may be elevated when either B12 or folate are deficient while an increase in MMA tests suggests B12 deficiency only. So, some health professionals are convinced that MMA and homocysteine tests are valuable in comprehending signs and symptoms of early and mild cases of B12 deficiency which may often overlap with those of folate deficiency.

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