how long do vitamin b12 injection side effects last Benefits of Shots Why Do I Feel Worse

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Who Might Benefit from B12 Injections

Since your body only absorbs a small amount at once, excess B12 just gets flushed out

The program emphasizes a healthy diet, realistic exercise planning, and stress management

Most medical documents indicate you might experience any of these: Mild diarrhea and/or upset stomach Difficulty breathing or swallowing Weight loss or weight gain Nervousness or restlessness Nausea or vomiting Headaches or migraines Paresthesias (tingling sensations) Rhinitis (chronic sneezing or a congested, drippy nose) Skin reactions, such as rash, itching, swelling, blisters, or pain at the site of injection Light joint pain Lightheadedness or dizziness Chest pain or discomfort Low blood potassium levels Irregular heartbeat Chills, night sweats, fever, or hot flushes General feeling of sickness However, people often fail to recognize that many side effects of vitamin B12 injections are consistent with B12 deficiency itself

A 2023 randomised study of 214 adults found only 0.9 lbs additional weight loss over three months compared to placebo not statistically significant