Summary: Vitamin B12 supplements can be taken at any time of day, as absorption mechanisms function consistently throughout the 24-hour cycle, with consistency being more important than specific timing
Avoid use if you are allergic to Methylcobalamin, Pyridoxine, Nicotinamide, or similar injections
Research shows vitamin B12 and B complex are safe to take together
A push uses IV access but delivers a smaller volume over a shorter visit than a saline-based drip
This is vastly more dilute than topical formulations, but isolated cells in culture have direct peptide access without any barrier to penetration
The ideal dosage of vitamin B12 varies based on your sex, age, and reasons for taking it