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These stem from impaired red blood cell production and nerve function, affecting oxygen transport and mental clarity.
While this means injecting a larger volume of fluid, the lower concentration reduces the intensity of the local immune response
One common myth is that oral B12 supplements are just as effective as injections
The systematic review protocol was registered in the International Prospective Register of Systematic Reviews (PROSPERO), registration number: CRD42024554513 (Available from) ( 2.2 PICOs question The primary research question addressed in this review was: What is the effectiveness of sublingual/oral administration of Vitamin B12 alone or compared to other forms of administration (e.g., intramuscular injection)?
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