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Vitamin B12 deficiency can suppress the symptoms of polycythemia vera
David Sinclair on Informational Theory of Aging
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
The agency advises consumers to: Only use medicines that have been prescribed by a registered healthcare professional and dispensed by a regulated pharmacy
Use a clean needle and syringe for each shot
