Audit a URL →

Sign in Sign up free

Loading…

Weekly · Sunday Morning

Five longevity claims.
Worth your time.
Every Sunday.

Last Sunday

Rapamycin extends mouse lifespan 9–14%
NAD+ precursors reverse aging in humans
Blue-light glasses improve sleep quality
Walking 10 min after meals blunts glucose
Verdict change — caffeine half-life downgraded

5 audits·1 verdict change·0 affiliate links·Every Sunday

Joining 1,247 readers — founders, MDs, and longevity-obsessed people who fact-check their own health decisions.

Browse

Decisions Claims Content Creators

Product

Audit a URL Sunday roundup API (soon)Pricing

About

FAQ Methodology Editorial Standards Corrections Press & brand RSS feed

Legal

Terms of Service Privacy Policy DMCA

Finally, something serious in this space.
Because we actually read the papers.

© 2026 Whalespan. Independent, evidence-graded longevity.

Biological Age vs. Real Age: Which Matters More? | Brian Kennedy, Ph.D. — Whalespan

Content›Video›Biological Age vs. Real Age:…

Biological Age vs. Real Age: Which Matters More? | Brian Kennedy, Ph.D.

Peter Attia10m · 2025-07-27

Claims Made

11

Claims Supported

8

Support Rate

73%

Support rate

8 of 11 claims supported

8 supported3 partial / not

Claims from this content

8

✓Well SupportedThe DNA methylation PhenoAge and GrimAge biomarkers were developed to predict lifespan and healthspan.◐Partially SupportedAn increase in specific clinical chemistry parameters within reference ranges can indicate a biological age increase of four years and a 50% increase in mortality risk.◐Partially SupportedAn experiment could compare placebo, metformin, rapamycin, SGLT2 inhibitors, and GLP-1 agonists for their impact on additional years of life.✕Not SupportedFirst-generation epigenetic clocks may be less accurate at predicting mortality than chronological age.Partially Supported

More from Peter Attia

Peter Attia on Zone 2 Cardio

Peter Attia on Rapamycin (with Matt Kaeberlein)

Attia walks back the clinic protocol: too aggressive for healthy adults

Discussion

Native comments, Twitter mentions, and Reddit threads about this content — surfaced together so the conversation isn't fragmented across platforms.

M

Share your read of this content…

Posting publicly as you · linked to your social profiles

Sort by:

AV

A. Volkovreader

4h

Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.

NP

N. Park

2d

Would love a "what would change this verdict" RSS feed. Sign me up if it exists.

◐

Epigenetic clocks show some correlation with mortality outcomes in longitudinal studies.

◐Partially SupportedThe clinical chemistry clock predicts mortality better than ASCVD measurements.

◐Partially SupportedActionable clinical chemistry markers can prompt clinicians to prescribe treatments or lifestyle modifications to reduce mortality risk.

◐Partially SupportedClinical chemistry markers can identify issues like smoking, metabolic disease, and obesity even when individual parameters are within the normal range.