It is not covered by Medicare but is still cheaper than ordering from Germany
Test When Indicated Persistent fatigue, anemia, numbness, tingling, balance changes, or a high-risk history can justify clinical evaluation and laboratory testing
Vegetarians and vegans, you probably need supplemental B12
No published data tracks metabolic changes after discontinuation of 5-Amino-1MQ, but based on the mechanism, NNMT activity would return to baseline within days to weeks after stopping
They are research context, not proven human dosing
Proton pump inhibitors and H2 receptor antagonists, commonly used for gastroesophageal reflux disease and peptic ulcer disease, may affect vitamin B12 status through multiple mechanisms