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However, many people find that their B12 levels are lower than optimal, whether due to dietary choices, gut absorption, the natural effects of ageing, or simply the demands of a busy lifestyle

Forman HJ, Zhang H, Rinna A

B12 is found mainly in animal foods and cannot be manufactured in the human body

Nasal delivery is an effective delivery strategy

Evidence Gaps: Most positive findings come from topical formulations or small studies

SAM is regenerated again and again in a permanent cycle: it releases its methyl group in various reactions, and then goes through a series of reaction steps, through which it receives a new methyl group and is thus available again as a methyl donor