NAD+ is everywhere right now — in podcasts, longevity clinics, and supplement aisles. But what does the science actually say?

If you've heard that NAD+ declines with age and wondered whether that matters for how you feel, how you think, and how well your body holds up over time — this book was written for you.

The NAD+ Longevity Guide cuts through the hype to give you a clear, evidence-based picture of one of the most actively researched molecules in longevity science. Written for curious, health-conscious readers — not researchers — it explains what NAD+ is, why it declines, what that decline means at the cellular level, and what the current science actually supports when it comes to slowing or reversing it.

Inside, you'll find:

• A plain-language explanation of how NAD+ works and why researchers consider it central to cellular aging
• An honest breakdown of the evidence on NMN and NR supplements — including what the human trials show, and where the gaps remain
• The lifestyle factors shown to meaningfully support NAD+ levels, often more reliably than supplements
• What the research says about NAD+ and brain health, muscle function, metabolic health, and cardiovascular aging
• A clear-eyed look at safety, dosing, and what to be skeptical of when evaluating products and claims
• A practical framework for making informed decisions based on your own health profile and goals

This is not a book that tells you what to take or promises you outcomes. It's a book that gives you the tools to evaluate the evidence yourself — so you can ask better questions, spot exaggerated claims, and make choices grounded in what science has and hasn't established.

The research on NAD+ is genuinely exciting. It's also frequently misrepresented. The NAD+ Longevity Guide gives you both sides — clearly, accurately, and without the sales pitch.

Part of the Brain and Body Longevity Library.