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The reason many people inject vitamin B12 for general health maintenance is because vitamin B12 helps the body perform so many of its crucial functions
doi: 10.1016/j.clinbiochem.2003.08.004
Vitamin B 12 deficiency is an easy thing to check for, its reasonably cost efficient and most Drs will happily check, so are we missing the symptoms
If the ratio is strongly shifted towards SAH, there is under-methylation
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