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This reaction forms 1-methylnicotinamide (1-MNA) and S-adenosyl-L-homocysteine (SAH)
Older adults are also at a higher risk of B12 deficiency due to decreased stomach acid levels, which are needed to separate B12 from protein in the diet for absorption
Vitamin B12 Deficiency Is Rare The liver can store excess vitamin B12, and only trace amounts are lost through daily bodily functions such as urination, perspiration, and defecation
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