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Some fortified foods, dietary supplements, and medications contain a synthetic version of vitamin B12
doi: 10.1210/en.2014-1304 58 ParadisJSLySBlondel-TepazGalanJABeautraitAScottMGet al
For others, it can take longer, especially if symptoms have been present for months or if there are multiple contributing factors (iron, vitamin D, thyroid issues, sleep, stress, etc.)
However, later research produced conflicting results
Larger formats are available, but the 10mL size minimizes waste and improves protocol consistency for most labs
All information provided is for educational and research purposes only
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