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If youve been feeling: Worn out no matter how much you sleep Mentally slow or forgetful Weak, pale, or dizzy Numbness in hands or feet Low mood or anxious for no reason these could all be signs of a vitamin B12 deficiency

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[DOI] [PMC free article] [PubMed] [Google Scholar] 149.Tapia-Arancibia L., Pares-Herbut N., Astier H

They work by signaling and modulating your body's existing repair and regenerative processes, not by introducing external hormones
