A recent Fox News article correctly points out that the NAD+ molecule is too large to get into cells:

From Fox News:

”While NAD+ itself is a large molecule that can’t cross into cells, NAD+ “precursors” can enter cells and then work to create NAD+, experts confirm.

These precursors include nicotinamide riboside (NR) and nicotinamide mononucleotide (NMN). Most people take these NAD+ precursors in the form of pills, capsules or powders”

Comment: So why is the market for NAD+ itself still booming?

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