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Mechanistically, these changes appear to coincide with elevated NAD+ and activation of metabolic gene programs consistent with increased energy expenditure
How long does a vitamin B12 injection last
Metformin, commonly prescribed for diabetes, and proton pump inhibitors used for acid reflux can both reduce B12 absorption over time
They usually start with high doses and then lower them for maintenance
Research suggests oral B12 supplements (especially sublingual forms) can be just as effective as injections for treating deficiency
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