Unlike others, the absorption of vitamin B12 depends on a protein called intrinsic factor, which is produced in the stomach
They require clinic visits, they cost more, and they don't offer a meaningful advantage over high-dose oral supplementation when absorption isn't the problem
Intake of vitamin b12 injection overdose can lead to several unpleasant symptoms, which may vary in severity depending on the level of overdose
Storage Information: Store at 20 to 25C (68 to 77F) [see USP Controlled Room Temperature]
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But, injections can last up to a month or more