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.

Your kale contains heavy metals — Whalespan

Content›Video›Your kale contains heavy met…

Your kale contains heavy metals

Paul Saladino8m · 2022-08-28

Claims Made

17

Claims Supported

13

Support Rate

76%

Support rate

13 of 17 claims supported

13 supported4 partial / not

Claims from this content

14

✓Well SupportedIndividuals with thyroid issues may need to limit cruciferous vegetables like broccoli and kale.✓Well SupportedOrganic kale can have higher levels of thallium than non-organic kale.✓Well SupportedIndividuals with high thallium levels from kale contamination experienced significant improvements after eliminating kale.✕Not SupportedKale contains isothiocyanates, pesticides like D-cal, and thallium, which can affect the thyroid.✓Well 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.

Thallium is highly toxic and has no established threshold limits in soils, agricultural products, feedstuffs, or foodstuffs in most countries.

✓Well SupportedProgoitrin and endolylic glucosinolates can degrade to compounds that decrease thyroid hormone production and inhibit radioiodine uptake.

◐Partially SupportedKale is frequently contaminated with the pesticide Dacthal (DCPA), which has negative endocrine-disrupting effects on the thyroid.

✕Not SupportedSpinach is a high-oxalate food and is not beneficial for health.

◐Partially SupportedKale does not contain Vitamin K2, but gut bacteria can synthesize it, and the liver can further process it.

◐Partially SupportedExcessive kale consumption may lead to toxicity in some individuals.

◐Partially SupportedFindings on thallium in kale are good science, though preliminary and not yet ready for broad population extrapolation.

◐Partially SupportedThallium uptake from contaminated soils into vegetables can endanger the food chain due to its high toxicity.

◐Partially SupportedThe measurements and clinical findings from Doctor's Data regarding kale contamination and patient outcomes have not been discredited.

✕Not SupportedEating the leaves of plants is inadvisable due to heavy metal uptake from the soil.