best injection site for b12 shot Where Should Vitamin Be Injected? A Real-World Guide to Feeling Your Best Vitamin B12 Injection Site:

Abdominal or stomach pain difficulty breathing swelling of your face, lips, tongue, or throat Diarrhea While there is some side effect of gaining weight but with its lack of quality research, B12 shots are being offered at some clinics for a weight-loss program that provides more energy and boosts metabolism, helping shed unwanted pounds

Sadrian is a double board-certified surgeon with almost two decades in professional practice

Pickart L, Margolina A

Those with severe deficiencies may receive more frequent Optimal B12 injection dosage for adults at first before tapering frequency

Light activity is fine, but avoid intense exercise for the remainder of the day if the injection site feels sore

Insomnia if dosed in the afternoon or evening the most preventable side effect on the list