If that weight does not match the theoretical weight of the compound, it is not the correct substance, no matter how pure it is
Jessberger S, Kempermann G
Unlike homocysteine, which responds to both B12 and folate intake, the metabolite methylmalonic acid (MMA) specifically responds to B12 intake, and for some time we viewed MMA levels as the most important measure of B12 activity
doi: 10.3390/ijms23010280 184 MatthayM
Subsequently, 100 L of a detection solution containing 5 mM ammonium molybdate, 2 mM zinc acetate, and 5.5% (w/v) ascorbic acid was added
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