Much to the disappointment of Dr. Charles Brenner, the supplement NMN (FAQs and Anecdotes) remains incredibly popular. Dr Brenner, who discovered Nicotinamide Riboside “NR” (FAQs) (Anecdotes) as an NAD precursor vitamin has repeatedly made the case against NMN arguing that it “makes no sense“. In response to some Twitter questions this week, Dr Brenner said the following:

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