Vitamin B12 shot side effects Most people tolerate vitamin B12 injections well, but possible side effects include: Mild: soreness or redness at injection site, mild diarrhea, nausea, headache, itching Rare but serious: allergic reactions (rash, swelling, difficulty breathing), low potassium (hypokalemia), dizziness or heart rate changes Get emergency medical help if you have signs of an allergic reaction to Vitamin B12: hives
Vitamin B12, also known as cobalamin, is part of the vitamin B complex a group of eight vitamins that support everything from optimal cognitive function to converting the carbohydrates you consume into usable energy
For people with a genuine deficiency, yes, the evidence is solid
Wipe the red inner seal with an alcohol swab