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Incidentally, the healthy reference range is 191-663 pg/ml and correlates closely with oral cobalamin intake, which is why the vitamin B12 blood level alone is not an adequate parameter to diagnose a deficiency (Herrmann and Obeid, 2014)
For people with absorption issues (and most adults over 50 have at least some), oral B12 simply doesnt deliver enough cobalamin to make a felt difference
It is compatible with vitamin B and vitamin C
What to expect after getting b12 shots
Reference: 3MLTFRSYRINGE 3ml Transfer Syringe 1 Syringe Material: lab measuring tool made of high-quality plastic
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