does sublingual b12 work as well as injections

5-amino-1mq human study — Metabolic Research · Synthesis Peptides Anemia Treatment:6 Months b12 injection vs oral – Treatment:3 Months loss https://lookaside.fbsbx.com/lookaside/crawler/media/?media_id=1517656540145440 This matters because many adults with low B12, whether from dietary restriction, aging, or conditions like pernicious anemia, cannot absorb enough B12 through food or oral supplements alone

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