how do you inject b12 Safe Injection Guide at Home B12 Shots vs. IV Infusions:

While benefits vary person to person, many people report feeling significantly better, especially if they were deficient before starting

For those with serious anemia, this medication may rarely cause hypokalemia (low potassium)

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Your healthcare provider can also diagnose B12 deficiency based on your medical history and physical exam

These may include mild digestive changes (nausea, altered bowel movements), increased energy levels that may feel stimulating initially, mild headaches (often related to dehydration), and minor injection site reactions (redness, temporary discomfort)