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[3] : 313 The most common cause in developed countries is impaired absorption due to loss of gastric intrinsic factor (IF), required for absorption

Alternatives to B12 Injections: When Injections Arent Ideal For some individuals, alternative delivery methods may be considered: Vitamin B12 Patches These are applied to the skin and claim to deliver B12 transdermally

By delaying gastric emptying and slowing intestinal transit time, the medication can disrupt this process, leading to inconsistent bowel movements

And so she gave me a shot in the arm." The Toronto woman said she switched to an over-the-counter supplement once her levels returned to normal