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.

The 3 types of friendships | Peter Attia & Arthur Brooks — Whalespan

Content›Video›The 3 types of friendships |…

The 3 types of friendships | Peter Attia & Arthur Brooks

Peter Attia6m · 2023-08-15

Claims Made

18

Claims Supported

18

Support Rate

100%

Support rate

18 of 18 claims supported

18 supported0 partial / not

Claims from this content

6

◐Partially SupportedFriendship is a skill that requires practice and can atrophy if not maintained.◐Partially SupportedIndividuals can achieve significant progress in forming friendships by actively developing social skills, even later in life.◐Partially SupportedThe human brain retains plasticity for learning new skills throughout life.◐Partially SupportedDeveloping strong friendships requires commitment, effort, and time, similar to building a social network over many years.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.

◐

While individuals can learn new skills at any age, proficiency comparable to starting in childhood (e.g., playing the cello) is not achievable if starting in later life.

◐Partially SupportedThe brain has plasticity for learning how to make and maintain friendships later in life.