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Myth: Everyone Needs Weekly Injections Many people think B12 shots are only for those with a diagnosed deficiency, but thats not the whole story
Wellness 21 May 2026 6 min read What happens if you inject B12 wrong
Once a repeated-entry vial is opened, a time limit applies, and that limit is usually 28 days unless the label states another period
The molecule sold today is not extracted from anyone's stomach
It relies on a protein called intrinsic factor in your stomach to be absorbed
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