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Healthy Man Daily

The archive

Healthy Man Daily is a men’s-health newsletter written and edited by an MD, published Monday through Friday at 5:30 AM ET. Every claim links to its source, every caveat prints, and every issue is archived here in full — reporting, never medical advice.

Locking in 7–9 hours: the dose–response link between sleep and all‑cause mortalityAll evidence here is observational (association, not causation), sleep duration is self‑reported, and short sleep often clusters with other risks (shift work, depression, cardiometabolic disease), so “fixing” sleep alone has not yet been shown in large RCTs to normalize mortality risk.Jun 2, 2026

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