Such developments would provide researchers with an expanded toolkit for investigating the complex relationships between metabolism, aging, and disease, potentially accelerating discoveries across multiple fields of biomedical research
The strongest support comes from clinical evidence focused on treating vitamin B12 deficiency, not from general wellness claims What science supports The NIH Fact Sheet for Health Professionals shows that intramuscular B12 injections are effective at raising blood B12 levels and correcting deficiency
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Other forms, including methylcobalamin and adenosylcobalamin, are available as well (130)
So, regardless of whether you are taking the recommended 2.4 mg daily, or are taking one single higher dose of the vitamin, the oral supplement form is usually going to suffice for most individuals who suffer from a deficiency
Yang, J