Community signal is large, enthusiastic, and longevity-driven, concentrated in anti-aging and biohacking circles where NAD+ precursors (NMN, NR) are treated as foundational rather than experimental. r/Longevity and r/NMN are primary discussion venues. The most consistently reported subjective effects are steadier daytime energy and reduced afternoon fatigue, with results typically described as gradual over several weeks rather than acute. The community is generally sophisticated about the precursor distinction, most informed users understand they are supplementing NMN or NR to raise NAD+ rather than taking NAD+ directly, and that oral NAD+ itself has poor bioavailability. Brand and purity are recurring themes, with users emphasizing third-party-tested, filler-free products. The most important signal-versus-evidence gap to flag is that subjective energy reports are difficult to separate from placebo without before-and-after NAD+ measurement, and the community itself is increasingly aware that long-term healthspan claims outrun the current human data.