can a b12 injection make you tired I Feel All the Time. Do I Need Shot?: Shawn Veiseh, M.D.: Family Medicine does b12 injections make you

Folic acid handling by the human gut: Implications for food fortification and supplementation

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

Vitamin B12 injections are commonly recommended for patients who have difficulty absorbing this essential vitamin through diet or oral supplements alone

PMC 201508