best place to inject vitamin b12 C and Injection Techniques Best Vitamin B12 Injection Site:

Duration of Energy Boost and Mental Clarity The energy boost and mental clarity that come from a B12 shot can last anywhere from a few days to a week, depending on your body's metabolism and existing B12 levels

Injections are particularly appropriate for those with: Pernicious anaemia, an autoimmune condition affecting B12 absorption Conditions affecting the stomach or small intestine, such as Crohns disease or coeliac disease Those who have had gastric surgery or bariatric procedures Strict vegans and vegetarians not meeting their B12 needs through food or oral supplements For those who can absorb B12 normally, oral supplements are generally an effective and well-evidenced alternative to injections

This is based on the current body of research and our observations of trends in the scientific community

ADVERSE REACTIONS: Intramuscular injection can occasionally cause skin rash, itching, diarrhea and allergic asthma