Human Psychopharmacology: Clinical and Experimental, e2872
. 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
Heres how: 1
Once you know the concentration in mg/mL, a dose in mg becomes a volume in mL by simple division, and that volume becomes insulin-syringe units by multiplying by 100 (because a U-100 syringe is marked so that 1 mL = 100 units)
B-12 injections bypass the digestive tract and deliver the vitamin directly into the bloodstream, ensuring quicker and more effective absorption
Bailey RL, Jun S, Murphy L, Green R, Gahche JJ, Dwyer JT, Potischman N, McCabe GP, Miller JW