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.

What is muscle hypertrophy? | Peter Attia and Andy Galpin — Whalespan

Content›Video›What is muscle hypertrophy? …

What is muscle hypertrophy? | Peter Attia and Andy Galpin

Peter Attia8m · 2024-03-24

Claims Made

10

Claims Supported

6

Support Rate

60%

Support rate

6 of 10 claims supported

6 supported4 partial / not

Claims from this content

5

◐Partially SupportedThe existence and nature of sarcoplasmic hypertrophy versus increases solely in contractile units was not definitively known until recently.◐Partially SupportedApproximately 67-70% of human body weight is water, with the majority residing within cells.◐Partially SupportedMuscle tissue stores its primary energy source, glucose, and requires water to do so.◐Partially SupportedMuscle hypertrophy primarily involves an increase in the diameter or cross-sectional area of muscle fibers.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.

◐

The distinction between sarcoplasmic hypertrophy (fluid retention) and contractile hypertrophy (enhanced contractile tissue like actin and myosin) is an area of ongoing research, with evidence suggesting both may occur and at different training phases.