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Ask your doctor for a total B12 test, as well as a screening for one or two of these compounds: holotranscobalamin, methylmalonic acid (MMA), and homocysteine
Maybe you saw them mentioned at a med spa near you
Vitamin B12 injections are the most common and effective way to prevent and treat a deficiency
It is excreted in the bile and undergoes some enterohepatic recycling
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