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Its not something your body can make on its own, so you have to get it from food or supplements
People may be able to administer their own injections
If the needle is too short for the person, or the angle is wrong, the dose can end up in subcutaneous fat, where absorption is slower and less predictable
Whether you want to enhance your athletic performance, want more energy to get you through the day, need to manage a B12 deficiency, or need a little boost for your metabolism, B12 injections can help
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