Although injections and supplements containing vitamin B12 are generally regarded as safe, there are potential side effects
Additional studies have investigated its influence on vascular endothelial growth factor (VEGF) and transforming growth factor-beta (TGF-?), signaling molecules that play important roles in hair follicle growth, vascularization, and cycling
Subcutaneous injections can be given in the stomach, the back of the upper arm, or your thigh
When intake is in play, the relevant details are the form, the dose per serving, how often the patient takes it, how long they have been taking it, and how recently
Association of vitamin B12, methylmalonic acid, and functional parameters
That controlling point is also recognized in the most recent reviews (Gwyer et al., 2019