Health claim
“Sleeping in a dark, cool room improves sleep quality.”
Claim checked — strong evidenceLow riskother
Evidence Summary
Multiple well-designed studies consistently support this claim.
Guidelines from sleep societies recommend low light and temperatures around 65°F (18‑19°C) for optimal sleep.
Extracted from
SLEEP EXPERT Reveals How To Optimize Your Sleep To LIVE LONGER! | Matt WalkerDr Rangan Chatterjee
Matt Walker, a leading sleep researcher, discusses evidence‑based strategies to improve sleep quality and duration, linking better sleep to longer, healthier lives.
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