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B12 and COVID injections Hi everyone, Its been ages since I posted but now have a query

Common side effects may include: Mild injection-site reactions (redness, soreness, itching) Upset stomach or nausea Headache Mild anxiety or restlessness Rarely, allergic reactions If you experience difficulty breathing, severe dizziness, or hives, seek medical attention immediately

These include the following: Thyroid C-Cell Tumors (Medullary thyroid carcinoma, MTC)
