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An important clinical paradox: elevated serum B12 can sometimes coexist with functional B12 deficiency

This action may contribute to improved overall health and a reduced risk of inflammatory-related conditions

So if someone is low in B12 and they consume alcohol, they not only don't have enough B12 to help 'clear away' the alcohol toxins but they also risk increasing homocysteine levels which I believe is that feeling of heat/hangover that can persist when there isn't enough B12 to reset the body