b12 injection sites subcutaneous Optimal for Maximum Absorption and Benefits b12 injections given subcutaneously injection

Common side effects (may affect up to 1 in 10 people): * Pain, redness, or swelling at the injection site * Nausea * Headache Uncommon side effects (may affect up to 1 in 100 people): * Diarrhea * Dizziness * Allergic reactions such as skin rash, itching, or hives Rare side effects (may affect up to 1 in 1,000 people): * Severe allergic reaction (anaphylaxis) with symptoms like difficulty breathing, swelling of the face or throat, and a drop in blood pressure

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The gap between these figures reflects an important distinction

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Some even claim B12 shots improve appearance of their skin, hair and nails