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When taken orally, vitamin D must pass through the digestive system where absorption can be inconsistent and limited, particularly for those with digestive issues
. Doctors may not be prescribing oral vitamin B12 formulations because they may be unaware of this option or have concerns regarding its effectiveness Objectives: To assess the effects of oral vitamin B 12 versus intramuscular vitamin B 12 for vitamin B 12 deficiency. Selection criteria: Randomized controlled trials (RCTs) comparing the effect of oral versus IM vitamin B 12 for vitamin B 12 deficiency
For those with a hectic lifestyle or frequent travel, a B12 injection can be the difference between dragging through the day and feeling your best
For keeping up the treatment, doses are usually given weekly to monthly
This may be at room temperature [20-25C (68-77F)], refrigerated [2-8 C (36 -46 F)], or frozen [-15 to -25C (5 to -13F)]