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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

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Tools to Set Your Cortisol Rhythm — Whalespan

Content›Video›Tools to Set Your Cortisol R…

Tools to Set Your Cortisol Rhythm

Andrew Huberman3m · 2025-08-06

Claims Made

9

Claims Supported

9

Support Rate

100%

Support rate

9 of 9 claims supported

9 supported0 partial / not

Claims from this content

8

✓Well SupportedA morning pulse of cortisol, promoting wakefulness and immune function, occurs naturally every 24 hours and can be timed by sunlight.✓Well SupportedA normal cortisol rhythm involves high levels upon waking, a rise a couple of hours after waking, a fall in the afternoon, and low levels at bedtime.✓Well SupportedCaffeine intake does not significantly increase cortisol levels in habitual users, but may prolong cortisol's effectiveness.✓Well SupportedIndividuals seeking to increase cortisol should start with the lowest possible dose of licorice root or black licorice, especially if consuming it later in the day.Well Supported

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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.

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N. Park

2d

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

✓

Exercising at moderate to high intensity in the evening can significantly increase baseline cortisol levels.

✓Well SupportedCold water exposure at colder temperatures can transiently increase cortisol levels, which eventually subside.

✓Well SupportedIngesting caffeine late in the day can extend the duration of cortisol in the bloodstream, causing it to decrease more slowly.

◐Partially SupportedConsuming grapefruit or grapefruit juice in the morning can increase morning cortisol levels and provide energy into the early afternoon.