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how fast does b12 injection work Injections: Who Should Get Them and Long Do They Last? How Quickly Does B12 Shot
Description
However, it turns out this theory was based on studies from the 1980s, which used an outdated method of urine nitrogen balance testing

These may include pain, redness or swelling at the injection site, mild diarrhea, nausea, or itching of the skin

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A 1ml syringe is often sufficient for typical B12 doses
