can you take too much vitamin b12 injections How Often I Injections? Vitamin B12 Side Effects: Risks

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B12 enhances the production of serotonin, the feel-good hormone that regulates your mood

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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