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Food and supplement basics (without overcomplicating it) If your clinician confirms that diet is a major contributor, the simplest strategy is to make B12 intake automatic. For omnivores, that often means regularly including B12-containing foods

"Pharmacokinetics of high doses of cyanocobalamin administered by intravenous injection for 26 weeks in rats"

NNMT inhibition combined with exercise enhances skeletal muscle endurance and grip strength in aged mice

But a journal published online by the scientist in her basement that is peer-reviewed by her cousin is not the same as a study published in a high-impact, reputable medical journal edited and peer-reviewed by proven leaders in the field