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doi: 10.1111/apt.14203
This condition requires lifelong intramuscular vitamin B12 therapy to prevent serious neurological complications
Olasupo Odunsi, MD, Medical Director Reviewed July 5, 2026 If you're constantly tired and your metabolism feels stuck, low B12 could be part of the problem
Related peptides Frequently Asked Questions Peptides are short chains of amino acids that perform various bodily functions, such as stimulating growth, tissue regeneration, or enhancing cognitive functions
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