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Evening use may be more likely to disrupt sleep, but this has not been tested in a controlled human study
This is why you shouldn't crush pills - a third of people find swallowing tablets tricky but grinding them up could do you more harm than good Which
On top of that, checking B12 blood levels once a year is a very poor indicator of true B12 status
2012;101(10):e439-e445
Theoretical concerns are not proof of harm, but they identify areas off-target SAM effects, signalling-pathway impacts, and uncharacterised interactions that require study before any conclusion about human safety could be drawn
3 to 7 days Clearer thinking, steadier mood, more stamina 2 to 4 weeks Steadier energy and more consistent day-to-day benefits 2 to 3 months+ Longer-term support for nerve function and steady Why a Shot Works Faster Than Oral Supplements When you swallow a B12 pill, it has to travel through your stomach and small intestine and rely on a protein called intrinsic factor to be absorbed
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