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HUBERMAN: Or into the shoulder or something of that sort if they're doing it intramuscularly
Vegans are at higher risk of Vitamin B12 deficiency because its scarce in plant-based foods
Side effects are rare but may include mild discomfort at the injection site, nausea, or digestive upset
[DOI] [PMC free article] [PubMed] [Google Scholar] Matalon E
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