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A1: It is for those patients who have multivitamin deficiency in the body or who cannot take oral supplements
B12 injections are injected into the muscle and dispersed over time, therefore bypassing the digestive tract, so you get much higher absorption than you would orally
Patients will often experience fatigue two days after their infusion leading many to schedule their infusions on a Thursday or Friday in order to give themselves the weekend to recuperate
This can create a paradoxical effect, where the individual feels less drunk due to the stimulating effects of caffeine but is actually more impaired
Some individuals have a deficiency of the B12 vitamin, which can be either due to natural reasons or dietary factors
The 28-day limit is therefore a safety margin that accounts for cumulative contamination risk across multiple punctures, not a reflection of preservative chemical degradation
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