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This makes it work faster
10.1016/j.archger.2006.02.003
Roles of NNMT in Energy Metabolism and the Related Mechanisms As a precursor of NAD + , NA methylation plays important roles in regulating energy metabolism because methylated NA is no longer able to be salvaged into NAD + [16]
For example, adults over 60 are more prone to deficiency due to decreased stomach acid production
