Longevity UnmaskedLongevity Unmasked

Real Science. A Brighter Tomorrow.

Longevity Unmasked

A Cardiologist Reveals What Works, What’s Hype, and How to Live (Almost) Forever

433 questions answered by cardiologist Afshine Ash Emrani, MD, FACC.

Get a free chapter of Longevity Unmasked

We ask only for your name and email. You’ll get an email to confirm (double opt-in), then your free chapter link. Unsubscribe anytime with one click. We never sell your email. Please don’t send health details.

Get the hardcover on Amazon

Popular: blood pressure · ApoB · GLP-1 · creatine · sauna · testosterone

Front cover of Longevity Unmasked by Afshine Emrani, MD, FACC: 433 Questions Answered

Featured topics

Go straight to what concerns you

Heart-health still life in navy and gold light

Heart Health

The Heart of the Matter · Know Your Numbers

30 questions →

Open book and walking shoes on navy, gold light

Brain Health

Protecting Your Brain · Sleep, Stress, and Mood

25 questions →

Plain injection pen on navy linen with warm gold light

Metabolic Health

Metabolism, Insulin Resistance, and the GLP-1 Era · Food, Fasting, and Alcohol

37 questions →

Skin patch, pump bottle and blister pack on navy linen

Hormones & Aging

The Truth About Aging · Bones and Joints · Menopause, Hot Flashes, and a Woman’s Second Half · Testosterone and a Man’s Second Half

56 questions →

Empty mammography suite in a bright, calm room

Cancer Prevention

Cancer: Prevention and Early Detection

16 questions →

Golden softgel capsules on navy velvet

Supplements, Drugs & Technology

Supplements, Ranked by Evidence · The Longevity Drugs · Repurposing Today’s Medicines for Longevity · The Toy Chest: Every Drip, Device, and Gadget, Graded · The Med Spa Menu: Skin, Shape, and Sex · Mind, Body, and the Experimental Shelf · The Frontier: Regenerative Medicine

119 questions →

Blood sample tubes and lab equipment in navy and gold light

Tests & Numbers

31 questions →

Cyclist seen from behind riding on a sunny road

Movement & Foundations

31 questions →

Calm bedroom at night with soft warm light

Sleep Apnea

9 questions →

Fermented foods, beans and berries on a sunny table

Gut, Inflammation & Immunity

10 questions →

Luxury clinic lobby in navy and marble

Industry, Clinics & Costs

23 questions →

Hands planting seedlings in a sunny flower garden

Purpose, Questions & What’s Next

46 questions →

All 12 topics shown; together they cover all 29 parts and 433 questions. Topic grouping is editorial navigation, not part of the book.

Start here

The one-page plan

If you read nothing else, read this page. It is the whole book in ten steps, in the order I would have you do them.

  1. 1Measure blood pressure properly at home. Discuss an appropriate target; below 130/80 mm Hg is common when treatment is indicated. Treating hypertension substantially reduces cardiovascular risk. (Part 3)
  2. 2Review your cardiovascular and metabolic risk. Begin with appropriate lipids and glucose testing; discuss Lp(a) once, and selective ApoB or hs-CRP when the result could change care. (Part 4)
  3. 3Lift something heavy twice a week, and walk every day. (Part 6)
  4. 4Allow roughly seven to nine hours for sleep on a regular schedule, and get tested if you snore. (Parts 7 and 8)
  5. 5Eat real food: half the plate plants, protein at every meal, little sugar, little alcohol. (Part 9)
  6. 6Do the screening that is proven: colon, breast, cervical, lung if you smoked, bone density, and a heart calcium score at the right age. (Parts 16 and 13)
  7. 7Treat what you find, early and without apology. Medicines for blood pressure and cholesterol are the real longevity drugs. (Parts 3 and 19)
  8. 8Stay current on vaccines, hearing, vision, and teeth. (Parts 24 and 12)
  9. 9Spend nothing on extras until steps 1 through 8 are done. Then use the scorecards. (Parts 20 and 5)
  10. 10Protect your people and your purpose. They predict your future as well as your cholesterol does. (Part 29)

In 60 seconds

Each part, distilled

Part 1

The Truth About Aging

  • Many diseases of later life develop over years; earlier risk reduction can help, but cannot prevent every death.
  • Your genes set less of your fate than your habits and your medical care do.
  • Five foundations beat every product: no tobacco, controlled blood pressure, muscle, sleep, and people.

Part 3

The Heart of the Matter

  • Heart disease is the leading killer and the most preventable.
  • Know three numbers: blood pressure, ApoB, and Lp(a).
  • A normal stress test does not exclude plaque. A calcium score detects calcified plaque and is useful in selected risk decisions.

Part 6

Muscle and Movement

  • Exercise is the most powerful medicine there is.
  • Two strength sessions and 150 minutes of easy cardio a week cover most of the benefit.
  • Strong legs and practiced balance are what prevent the fall that ends independence.

Part 11

Metabolism, Insulin Resistance, and the GLP-1 Era

  • Insulin resistance smolders for a decade before diabetes is diagnosed.
  • Waist size, glucose testing, lipids, and the clinical history help identify metabolic risk.
  • GLP-1 medicines are a major advance; they require protein and strength training.

Part 17

Supplements, Ranked by Evidence

  • No supplement has been shown to extend human life.
  • Test, correct what is low, and add only what has human evidence.
  • Bring every bottle to your doctor once a year.

Part 20

The Toy Chest: Every Drip, Device, and Gadget, Graded

  • Sort every gadget onto three shelves: reasonable, pleasant, or leave it.
  • Sauna has the best long-term data of any of these toys.
  • IV drips, NAD infusions, cryotherapy, and soft pressure chambers are not worth the money.

See all 29 parts →

Tools from the book

Check yourself, then talk to your doctor

Screening and record-keeping only, never a diagnosis. Everything you enter stays in your browser.

STOP-BANG sleep apnea screening

Eight yes-or-no items from Part 8, Q110.

Metabolic syndrome check

Five measures from Part 11, Q137.

The 13 areas prevention review

A checklist for your next visit, from Part 5, Q65.

Home strength and balance tests

Grip, chair stands, walking speed, one-leg stand (Part 4, Q49).

The book’s five worksheets

My Numbers, screening, my last good decade, purpose, people.

How to read the evidence

Every answer tells you what it rests on

Each numbered answer ends with an evidence scope: what kind of knowledge supports the answer, whom it concerns, and which outcome it addresses. A strong result for one use does not establish a different use. Relief of pain, a lower blood test, fewer heart attacks, and longer life are different outcomes.

ROBUST HUMAN TRIALS means reasonably convincing intervention evidence for the stated population and outcome. It does not mean everyone should take the treatment. LIMITED or SMALL HUMAN STUDIES means the available trials leave important uncertainty.

OBSERVATIONAL means an association was measured without random assignment. A finding can be consistent and important while still being affected by confounding, selection, or reverse causation. A risk marker is not automatically a treatment target.

PRECLINICAL means cells or animals. NOT DEMONSTRATED means that the proposed clinical benefit has not been established; it does not prove that benefit is impossible. A negative trial is described for the population and endpoint it actually tested.

GUIDELINE-BASED, REGULATORY STATUS, and CLINICAL JUDGMENT answer different questions. A recommendation is not a trial result. FDA approval is indication-specific. A spending preference or forecast is not given a clinical efficacy grade.

01

THE EVIDENCE LADDER

HUMAN OUTCOME TRIALS → OBSERVATIONAL DATA → SMALL HUMAN STUDIES → ANIMAL AND CELL STUDIES. Each answers a different question. Strong evidence for one outcome does not prove a different outcome.

02

THE MONEY FILTER

FIRST: blood pressure, smoking, lipids, exercise, sleep, preventive care. NEXT: tests or treatments that change a decision. LAST: expensive devices, infusions, and experimental compounds. Ask: What improves, for whom, and at what risk?

03

THE TEST-TO-ACTION PATH

QUESTION → Is the test validated? → Would the result change care? → Are false positives understood? → Discuss with your clinician → Act and reassess.

04

THE HEALTHSPAN EQUATION

Years alive ≠ years well. Protect physical function, cognition, independence, and relationships. No single biomarker or gadget measures the whole person.

Read the full explainer →

The book at a glance

What the evidence looks like across 433 answers

All 433 answers by evidence grade

Evidence grade. 433 questions; a question with mixed evidence counts under each grade.

A Robust human trials: 73; B Limited or small human studies: 66; C Observational: 64; D Preclinical / mechanistic: 14; E Established clinical knowledge: 19; G Guideline-based / consensus: 59; R Regulatory status: 11; J Clinical judgment / author synthesis: 56; F Not demonstrated / insufficient: 37; Grade pending: 53A · Robust human trials73B · Limited or small human studies66C · Observational64D · Preclinical / mechanistic14E · Established clinical knowledge19G · Guideline-based / consensus59R · Regulatory status11J · Clinical judgment / author synthesis56F · Not demonstrated / insufficient37Grade pending53

Figure from the book · Q2

Illustration, not data. A long-healthspan line stays near full function until near age 90 then drops; a typical line declines from about age 55, leaving years of disability. The shaded area between them is the gap the foundations close.405060708090AgeFunction (illustrative)The gap thefoundations closeLong healthspan: well until near the endTypical decline: years of disability
Two ways to grow old. The aim is not only a longer line but a line that stays high until near the end. (Illustration, not data.)
Evidence mix in all 29 parts

Evidence grade: share of each part’s grade tags. Select a part to open it.

  • A Robust human trials
  • B Limited or small human studies
  • C Observational
  • D Preclinical / mechanistic
  • E Established clinical knowledge
  • G Guideline-based / consensus
  • R Regulatory status
  • J Clinical judgment / author synthesis
  • F Not demonstrated / insufficient
  • Pending
Part 1: A 2, B 1, C 2, D 1, E 2, G 1, J 2, F 1. Part 2: A 1, B 2, C 1, G 1, J 9, F 1. Part 3: A 6, C 6, E 2, G 2, J 1, pending 1. Part 4: B 1, C 3, G 4, J 1, F 2, pending 2. Part 5: A 3, B 3, C 1, G 12, J 3, F 6, pending 4. Part 6: A 6, C 4, E 1, G 1. Part 7: A 2, B 2, C 4, G 1, J 1. Part 8: A 1, B 1, C 2, E 1, G 1, pending 3. Part 9: A 3, B 2, C 3, G 3, J 2, pending 2. Part 10: C 3, G 1, J 3. Part 11: A 7, C 3, D 1, E 2, G 6, R 2, F 2. Part 12: A 2, B 2, C 5, D 1, E 3, G 1, R 1, F 1, pending 1. Part 13: A 4, B 2, C 1, E 1, G 2, pending 2. Part 14: A 3, C 5, D 1, E 1, G 3, F 1, pending 2. Part 15: A 3, B 1, C 2, E 1, G 5, R 1, pending 3. Part 16: A 5, C 1, G 3, R 1, J 1, F 2, pending 3. Part 17: A 5, B 8, D 2, G 1, R 1, J 2, F 2, pending 2. Part 18: A 1, B 2, D 2, E 2, J 3. Part 19: A 8, C 2, D 1, J 3, F 2, pending 1. Part 20: B 12, C 1, D 3, E 1, R 1, J 4, F 10, pending 2. Part 21: A 2, B 5, G 1, R 1, J 1, pending 3. Part 22: A 3, B 12, J 1, F 3, pending 5. Part 23: B 3, D 1, F 2. Part 24: A 1, B 1, C 4, D 1, E 1, pending 2. Part 25: B 1, C 3, R 1, J 6, F 1, pending 3. Part 26: G 2, J 4, pending 2. Part 27: A 4, B 2, C 5, E 1, G 4, J 1, F 1, pending 5. Part 28: A 1, B 3, G 1, R 2, J 3, pending 5. Part 29: C 3, G 3, J 51. The Truth About AgingPart 1, A: 2Part 1, B: 1Part 1, C: 2Part 1, D: 1Part 1, E: 2Part 1, G: 1Part 1, R: 0Part 1, J: 2Part 1, F: 1Part 1, pending: 02. Lessons from the Longevity GiantsPart 2, A: 1Part 2, B: 2Part 2, C: 1Part 2, D: 0Part 2, E: 0Part 2, G: 1Part 2, R: 0Part 2, J: 9Part 2, F: 1Part 2, pending: 03. The Heart of the MatterPart 3, A: 6Part 3, B: 0Part 3, C: 6Part 3, D: 0Part 3, E: 2Part 3, G: 2Part 3, R: 0Part 3, J: 1Part 3, F: 0Part 3, pending: 14. Know Your NumbersPart 4, A: 0Part 4, B: 1Part 4, C: 3Part 4, D: 0Part 4, E: 0Part 4, G: 4Part 4, R: 0Part 4, J: 1Part 4, F: 2Part 4, pending: 25. The Advanced Testing Menu, GradedPart 5, A: 3Part 5, B: 3Part 5, C: 1Part 5, D: 0Part 5, E: 0Part 5, G: 12Part 5, R: 0Part 5, J: 3Part 5, F: 6Part 5, pending: 46. Muscle and MovementPart 6, A: 6Part 6, B: 0Part 6, C: 4Part 6, D: 0Part 6, E: 1Part 6, G: 1Part 6, R: 0Part 6, J: 0Part 6, F: 0Part 6, pending: 07. Sleep, Stress, and MoodPart 7, A: 2Part 7, B: 2Part 7, C: 4Part 7, D: 0Part 7, E: 0Part 7, G: 1Part 7, R: 0Part 7, J: 1Part 7, F: 0Part 7, pending: 08. Sleep Apnea, the Silent ThiefPart 8, A: 1Part 8, B: 1Part 8, C: 2Part 8, D: 0Part 8, E: 1Part 8, G: 1Part 8, R: 0Part 8, J: 0Part 8, F: 0Part 8, pending: 39. Food, Fasting, and AlcoholPart 9, A: 3Part 9, B: 2Part 9, C: 3Part 9, D: 0Part 9, E: 0Part 9, G: 3Part 9, R: 0Part 9, J: 2Part 9, F: 0Part 9, pending: 210. The Blue Zones FormulaPart 10, A: 0Part 10, B: 0Part 10, C: 3Part 10, D: 0Part 10, E: 0Part 10, G: 1Part 10, R: 0Part 10, J: 3Part 10, F: 0Part 10, pending: 011. Metabolism, Insulin Resistance, and…Part 11, A: 7Part 11, B: 0Part 11, C: 3Part 11, D: 1Part 11, E: 2Part 11, G: 6Part 11, R: 2Part 11, J: 0Part 11, F: 2Part 11, pending: 012. Protecting Your BrainPart 12, A: 2Part 12, B: 2Part 12, C: 5Part 12, D: 1Part 12, E: 3Part 12, G: 1Part 12, R: 1Part 12, J: 0Part 12, F: 1Part 12, pending: 113. Bones and JointsPart 13, A: 4Part 13, B: 2Part 13, C: 1Part 13, D: 0Part 13, E: 1Part 13, G: 2Part 13, R: 0Part 13, J: 0Part 13, F: 0Part 13, pending: 214. Menopause, Hot Flashes, and a Woman…Part 14, A: 3Part 14, B: 0Part 14, C: 5Part 14, D: 1Part 14, E: 1Part 14, G: 3Part 14, R: 0Part 14, J: 0Part 14, F: 1Part 14, pending: 215. Testosterone and a Man’s Second HalfPart 15, A: 3Part 15, B: 1Part 15, C: 2Part 15, D: 0Part 15, E: 1Part 15, G: 5Part 15, R: 1Part 15, J: 0Part 15, F: 0Part 15, pending: 316. Cancer: Prevention and Early Detect…Part 16, A: 5Part 16, B: 0Part 16, C: 1Part 16, D: 0Part 16, E: 0Part 16, G: 3Part 16, R: 1Part 16, J: 1Part 16, F: 2Part 16, pending: 317. Supplements, Ranked by EvidencePart 17, A: 5Part 17, B: 8Part 17, C: 0Part 17, D: 2Part 17, E: 0Part 17, G: 1Part 17, R: 1Part 17, J: 2Part 17, F: 2Part 17, pending: 218. The Longevity DrugsPart 18, A: 1Part 18, B: 2Part 18, C: 0Part 18, D: 2Part 18, E: 2Part 18, G: 0Part 18, R: 0Part 18, J: 3Part 18, F: 0Part 18, pending: 019. Repurposing Today’s Medicines for L…Part 19, A: 8Part 19, B: 0Part 19, C: 2Part 19, D: 1Part 19, E: 0Part 19, G: 0Part 19, R: 0Part 19, J: 3Part 19, F: 2Part 19, pending: 120. The Toy Chest: Every Drip, Device, …Part 20, A: 0Part 20, B: 12Part 20, C: 1Part 20, D: 3Part 20, E: 1Part 20, G: 0Part 20, R: 1Part 20, J: 4Part 20, F: 10Part 20, pending: 221. The Med Spa Menu: Skin, Shape, and …Part 21, A: 2Part 21, B: 5Part 21, C: 0Part 21, D: 0Part 21, E: 0Part 21, G: 1Part 21, R: 1Part 21, J: 1Part 21, F: 0Part 21, pending: 322. Mind, Body, and the Experimental Sh…Part 22, A: 3Part 22, B: 12Part 22, C: 0Part 22, D: 0Part 22, E: 0Part 22, G: 0Part 22, R: 0Part 22, J: 1Part 22, F: 3Part 22, pending: 523. The Frontier: Regenerative MedicinePart 23, A: 0Part 23, B: 3Part 23, C: 0Part 23, D: 1Part 23, E: 0Part 23, G: 0Part 23, R: 0Part 23, J: 0Part 23, F: 2Part 23, pending: 024. Gut, Inflammation, and ImmunityPart 24, A: 1Part 24, B: 1Part 24, C: 4Part 24, D: 1Part 24, E: 1Part 24, G: 0Part 24, R: 0Part 24, J: 0Part 24, F: 0Part 24, pending: 225. Inside the Longevity IndustryPart 25, A: 0Part 25, B: 1Part 25, C: 3Part 25, D: 0Part 25, E: 0Part 25, G: 0Part 25, R: 1Part 25, J: 6Part 25, F: 1Part 25, pending: 326. Clinics, Costs, and ScamsPart 26, A: 0Part 26, B: 0Part 26, C: 0Part 26, D: 0Part 26, E: 0Part 26, G: 2Part 26, R: 0Part 26, J: 4Part 26, F: 0Part 26, pending: 227. Everything Else You Wanted to AskPart 27, A: 4Part 27, B: 2Part 27, C: 5Part 27, D: 0Part 27, E: 1Part 27, G: 4Part 27, R: 0Part 27, J: 1Part 27, F: 1Part 27, pending: 528. What Is ComingPart 28, A: 1Part 28, B: 3Part 28, C: 0Part 28, D: 0Part 28, E: 0Part 28, G: 1Part 28, R: 2Part 28, J: 3Part 28, F: 0Part 28, pending: 529. Purpose, People, and Your PlanPart 29, A: 0Part 29, B: 0Part 29, C: 3Part 29, D: 0Part 29, E: 0Part 29, G: 3Part 29, R: 0Part 29, J: 5Part 29, F: 0Part 29, pending: 0
The 13 areas of a prevention review

I use thirteen areas to organize a prevention conversation. They are not thirteen targets that everyone must measure or drive downward. (Part 5, Q65)

1. Blood pressure; 2. LDL cholesterol and, selectively, ApoB; 3. Lp(a); 4. Glucose regulation; 5. Triglycerides and HDL; 6. Waist size; 7. Kidney function; 8. Liver health; 9. Fitness; 10. Strength and balance; 11. Bone and fracture risk; 12. Screening and vaccination status; 13. Medication and supplement review1234567891011121313areas
  1. 1.Blood pressure
  2. 2.LDL cholesterol and, selectively, ApoB
  3. 3.Lp(a)
  4. 4.Glucose regulation
  5. 5.Triglycerides and HDL
  6. 6.Waist size
  7. 7.Kidney function
  8. 8.Liver health
  9. 9.Fitness
  10. 10.Strength and balance
  11. 11.Bone and fracture risk
  12. 12.Screening and vaccination status
  13. 13.Medication and supplement review

Use the 13-areas checklist →

Afshine Ash Emrani, MD, FACC
Longevity Unmasked logo

Live Longer. Live Wiser.

About the author

Afshine Ash Emrani, MD, FACC, is a board-certified cardiologist and the founder of Los Angeles Heart Specialists in Tarzana, California, which he established in 1999. He is an Assistant Clinical Professor at the UCLA David Geffen School of Medicine, where he has been on the clinical faculty for more than two decades.

Dr. Emrani has held Castle Connolly Top Doctor recognition since 2008 and has been named a Los Angeles Magazine Super Doctor since 2010. He is the author of Beyond the White Coat, A Woman’s Heart, GLP-1 Breakthrough, Echoes, Awaken to Your Soul, and other books, and writes regularly on medicine, meaning, and the inner life in his Substack newsletter.

His work rests on a simple conviction: that the best medicine treats the whole person, body and soul, and that a physician’s first duty is to tell the truth kindly.

A Healthier You. A Brighter Tomorrow.

Voices worth following

Keep learning from evidence-minded creators

On X

  • Eric Topol, MD @EricTopol

    Physician-scientist; author of Super Agers; writes Ground Truths.

    831K followers

    Follow

  • Peter Attia, MD @PeterAttiaMD

    Physician focused on longevity; author of Outlive (discussed in the book).

    664K followers

    Follow

  • Layne Norton, PhD @BioLayne

    Nutritional sciences PhD known for debunking diet and supplement myths.

    233K followers

    Follow

  • Matt Kaeberlein, PhD @mkaeberlein

    Biology-of-aging researcher; candid about what is and is not proven.

    32K followers

    Follow

  • Andrew Steele, PhD @statto

    Longevity scientist and author of Ageless; science communicator.

    13K followers

    Follow

On Substack

Inclusion is not endorsement. These creators are listed for evidence-focused reputation and reach. Their views are their own and may differ from the book. Counts were verified on 2026-10-22; latest Substack posts were fetched when this site was built (Oct 23, 2026).

Full list with sources →

Longevity Unmasked book cover

The book

Cut Through the Noise. Get the Facts That Matter.

433 Evidence-Graded Answers About Living Longer and Better. Revised edition, October 2026.

Get the hardcover on Amazon