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Unlike others, the absorption of vitamin B12 depends on a protein called intrinsic factor, which is produced in the stomach
Swallow oral supplements Oral B12 supplements come in a variety of forms, including lozenges, gummies, tablets, and soft gels
It's a single-use option, so it isn't meant for vials you'll draw from repeatedly.
For research purposes, dosages are usually between 100 mcg and 300 mcg delivered 30 to 60 minutes before sleep
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