what does injectable b12 do Feeling Tired All the Time? It Might Be a Vitamin Deficiency The Benefits of Vitamin B12

Patients with a SULFA allergy should not take MIC B12 injections due to the methionine component [2]

It plays a vital role in the healthy functioning of many systems in the body, including the following: DNA (genetic material) synthesis Energy production (metabolism) Nerve cell health Neurological (brain) function Red blood cell (hemoglobin) formation Vitamin B12 plays a key role in the normal functioning of the brain and nervous system

Blood 1998;92:1191-1198

[2] Risk factors may occur possibly more in elderly people due to impaired intestinal absorption, and in children, premenopausal women, and pregnant women, whose diets are low in animal foods

Allergic reactions are rare but possible