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Evidence Review
Sleep
Verdict
ProvenEvidence Tier
S
Strongest evidence
Human Studies
Yes — extensive
Typical Cost
$0/mo
Sleep duration and regularity are independently associated with all-cause mortality. Consistently sleeping less than 6 hours or more than 9 hours is linked to increased mortality risk. Sleep regularity — going to bed and waking at consistent times — may be even more important than duration. No supplement can compensate for chronically poor sleep.
The full evidence review — including why sleep regularity may matter more than duration — and why your sleep tracker might be making things worse — is in Section 6 (Sleep) of The Anti-Longevity Playbook.
Reviewed by Dr. Ramy Khalil, MD · Double Board-Certified Internal Medicine · Last updated March 2026
How important is sleep for longevity?
Sleep duration and regularity are independently linked to all-cause mortality. Regularity may be more important than duration. No supplement compensates for chronically poor sleep.
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