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Description
NNMT normally methylates nicotinamide using S-adenosylmethionine (SAM) as a methyl donor, producing 1-methylnicotinamide and S-adenosylhomocysteine

Even so, it comes with notable side effects when you consider the injectable form

Stress and Mood Regulation: Supports nervous system function, aiding stress management

B2 Riboflavin: Boosts metabolism and supports the immune system

Vendor technical sheets and primary studies report selectivity over related methyltransferases and enzymes of the NAD salvage pathway [1,6,7]
