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Most vegans who use fortified foods or a daily supplement maintain normal B12 levels without ever needing an injection
Injectable remains the standard route for tirzepatide
Its activity intersects two major metabolic pathways simultaneously: the NAD+ biosynthesis pathway (by consuming nicotinamide, an NAD+ precursor, NNMT competes with the NAD+ salvage pathway) and the methyl-donor pathway (by consuming SAM, NNMT reduces the availability of methyl groups for epigenetic and metabolic methylation reactions)
I was scared to death to give myself my first shot, but proud to say I did it (after a 10-minute pep talk)
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