80+ studies. 40+ interventions graded. Nothing to buy.
Slow your pace of aging with what the evidence actually supports.
Over 80 peer-reviewed studies on longevity, checked, cross-referenced and ranked into one priority list for adults over 40. Failed and sponsored studies are flagged. There’s a 30-day plan, no supplements to buy and nothing to sign up for.
- Instant download, 63-page PDF
- Opens on any phone, tablet or computer
- 30-day money-back guarantee
- 80+ studies checked and ranked
- 40+ interventions graded
- Failed and sponsored studies flagged
- A 30-day plan
What changes when you finish the book
Guessing, and paying for it.
- Supplements, “longevity” stacks and biological-age tests bought on hope
- Blue Zones, biohacks and clinic upsells you can’t judge
- Feeling that decline is simply what happens after 40
Deciding for yourself.
- One priority list, ordered by the strength of human evidence
- Knowing which claims fell apart when they were retested
- Function you can measure and improve: grip, walking speed, chair stands
Does any of this sound familiar?
You don’t need another product. You need the studies read for you, ranked by how strong they are, with the ones that failed or were paid for by a seller flagged.
- You feel older than you are, and you want to slow it down.
- Your feed sells NAD+, peptides and senolytics as if they’re proven.
- You paid for a biological-age test and don’t know what to do with the number.
- You want to stay strong, sharp and independent for decades, not just live longer.
- You don’t have time to read 80 studies yourself.
What the research says
Every key claim in the book carries a tag showing where the evidence comes from. Here are four of them.
lower all-cause mortality over 15 years for people who kept up aerobic and resistance exercise.
lower all-cause mortality for an ideal versus poor score on the eight cardiovascular basics, Life’s Essential 8.
extra years of life from age 45 with a defined healthy dietary pattern.
of adults over 65 improved in cognitive or physical function over up to twelve years, in one nationally representative study.
The most effective steps are mostly free
Longevity clinics sell scans, panels and memberships. The book’s priority list starts with exercise and blood pressure, and leaves out every supplement, every peptide and every biological-age test.
Clinic prices are published 2026 ranges from the sources below. Shown for comparison only, not as a recommendation for or against any treatment.
Look inside
Real pages from the 63-page book. Tap a page to open it full screen, then tap again to zoom in.
What’s inside
The evidence-graded guide to what actually slows your pace of aging, and what does not.
- –What “reverse” means hereIntroduction
- 1How to read evidence in this field
- 2What aging is
- 3The priority list
- 4Exercise
- 5Diet
- 6The gut microbiome
- 7Sleep and circadian rhythm
- 8Vaccination and immune protection
- 9Cardiovascular protection
- 10Exposures to remove
- 11Measurement
- 12Genetics and limits
- 13Therapies in development
- 14Trajectory is not fixed
- AEvidence gradesAppendix
- BImplementation, the first 30 daysAppendix
This book is for you if
- You’re over 40 and want to slow your pace of aging with things that are proven.
- You want a plan you can start this month, not a shopping list.
- You like knowing who funded a study before you trust it.
It isn’t for you if
- You want a product that reverses aging today. Nothing on sale does, and the book explains exactly where the science stands.
80+ studies. 40+ interventions graded. Nothing to buy.
Reverse Aging
- 80+ studies checked and ranked
- 40+ interventions graded
- Failed and sponsored studies flagged
- A 30-day plan
- 63-page PDF, instant download, yours to keep
Read it risk-free. If it doesn’t help, email us within 30 days for a full refund.
Not ready to buy? Start free.
Twelve things the aging research says
An eight-minute briefing from the book: twelve findings nobody selling you something will tell you. It may save you several hundred dollars a year.
Download the free guideTwo pages, free. No email needed; it opens in a new tab. Education, not medical advice.
Questions, answered
Can aging really be reversed?
In one tissue, in mice, yes, and the first human safety trial began in June 2026. Nothing you can buy does it. What’s achievable now is slowing your pace of aging and reversing functional decline, which is what the book focuses on.
Do I need to buy supplements or tests?
No. Every supplement, peptide and biological-age test is absent from the priority list, and the book explains why.
How long is it?
63 pages, as a PDF. It opens on any phone, tablet or computer. The tables and charts are easiest to read on a tablet or computer, or zoomed in on a phone.
Who writes PrimeSpan books?
PrimeSpan, an independent publisher of research guides. Each book is a synthesis of published research, prepared with AI assistance from the studies, regulator documents and guidelines listed at the back. It was not written by a doctor and has not been reviewed by one, so every key claim carries an evidence grade and a source you can check. Use it to prepare for an appointment, never instead of one. How the books are made
How do I get the book?
Right after checkout you get a download link on screen and by email.
Is this medical advice?
No. It’s an educational synthesis of published research that helps you understand your options and have a better conversation with your clinician.
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Figures on this page come from the book, which lists every source with its evidence tag. Outside sources used on this page: