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They are not FDA-approved for medical, diagnostic, or therapeutic purposes
Here are some common side effects- Common side effects Pain, redness, or swelling at the injection site Mild diarrhea or upset stomach Nausea or vomiting Dizziness Headaches Rare but serious side effects Allergic reaction, including itchiness, hives, difficulty in breathing, or swelling on the face, lips, and throat Irregular heartbeat It is essential to consult with a healthcare provider before starting vitamin B12 injections to ensure they are appropriate for your specific health needs and to receive proper administration guidance
This can happen due to low levels of intrinsic factors in the digestive system, digestive conditions, or following a plant-based diet
Competitive athletes should not use it
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