If anything other than sterile saline was added, it may have been a preservative that you had reacted to
Pernicious anaemia is more common in people who already have autoimmune conditions such as Crohns disease and ulcerative colitis (both types of inflammatory bowel disease)
Injections bypass the damaged area and deliver B12 into the bloodstream
It helps the liver remove heavy metals and other toxins from our bloodstream, promote a more effective immune system, reduces the effects of aging, cellular rejuvenation, skin brightening, evening out skin tone, softens fine lines and wrinkles, increases strength & endurance, decreases recovery time from injury& strenuous workouts, less fatigue and increases muscle promoting activities.
If single morning administration produces satisfactory results, adding complexity provides no advantage
Who should consider getting B12 shots