The Sleep Time Sweet Spot Is Real: Missing It Linked To Faster Aging

Key Points:

• A new study published in Nature reveals that both too little (under 6 hours) and too much sleep (over 8 hours) are linked to accelerated biological aging across multiple organ systems, not just the brain.
• The research analyzed data from around 500,000 UK Biobank participants using 23 aging clocks based on brain and organ scans, blood proteins, and chemical markers, identifying an optimal sleep range of roughly 6.4 to 7.8 hours per night.
• Short sleep was associated with a broad range of health risks including cardiovascular disease, diabetes, and psychiatric disorders, while long sleep showed stronger links to brain-related conditions like depression and schizophrenia, possibly signaling existing health issues.
• Both short and long sleep patterns increased the risk of death, with short sleepers facing a 50% higher hazard and long sleepers a 40% higher hazard compared to those sleeping 6 to 8 hours.
• The study highlights different pathways linking sleep duration to late-life depression, with short sleep having a direct effect and long sleep influencing depression through organ aging, especially in the brain and fat tissue.