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So the 100% figure is an assumption from how systemic administration generally behaves, not a measured number for this compound

(1996) Vitamin B12 enhances the phase-response of circadian melatonin rhythm to a single bright light exposure in humans

The dosage and administration of Cyanocobalamin are determined by a healthcare provider based on the patients age, medical condition, and the severity of the B12 deficiency

People should consult their insurer about co-pays and prior approval

Taking B12 in the morning may help establish a consistent routine, which is important for supplement adherence
