Without enough B12, you might feel tired, have nerve problems, or face serious health issues
Injection site reactions such as minor redness, transient swelling, or localized soreness are normal and usually resolve within 24 hours
Vitamin B12 shots are administered most often in those with genetic conditions that block absorption and people with the disorder called pernicious anemia, which can result in severe malabsorption and deficiency
B12 protects your brain cells in the same way it helps protect nerve cells, by protecting their myelin sheaths
For many people, especially those with certain health conditions, this process doesn't work well
Together, they address repair from two different biological angles