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.

Stop fearing Vitamin A — Whalespan

Content›Video›Stop fearing Vitamin A…

Stop fearing Vitamin A

Paul Saladino5m · 2022-03-26

Claims Made

10

Claims Supported

8

Support Rate

80%

Support rate

8 of 10 claims supported

8 supported2 partial / not

Claims from this content

8

✓Well SupportedSupplementing with retinol and iron in boys with delayed puberty can induce puberty as effectively as testosterone replacement therapy.✓Well SupportedBoron supplementation may decrease SHBG, which can increase libido, especially when SHBG is elevated due to a ketogenic diet.✓Well SupportedBoron beneficially impacts the body's use of estrogen, testosterone, and vitamin D.◐Partially SupportedAn animal-based diet can provide adequate boron, ideally 3-4 mg per day.◐Partially Supported

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 bioavailability of boron from nuts, seeds, beans, lentils, and grains may be poor due to oxalates and phytic acid.

◐Partially SupportedBoron can be obtained from animal foods, fruits, and honey, suggesting it is not a nutrient typically missed on a diet excluding vegetables.

◐Partially SupportedAvocados are healthy fruits and a good source of boron, folate, and riboflavin, but should not be consumed to the exclusion of animal fats.

✕Not SupportedBoron from vegetables and nuts may not be very bioavailable and is not worth obtaining from these sources due to potential issues like phytic acid and digestive enzyme inhibitors.