Sleeping with the lights on can pose serious health risks. Exposure to artificial light during sleep disrupts the circadian rhythm, affecting hormone release and sleep quality. Even low light levels reduce REM and deep sleep stages, leading to fatigue, poor concentration, and mood issues. Over time, this can increase the risk of metabolic problems like obesity and diabetes, as well as cardiovascular diseases, weakened immunity, and mental health issues such as depression and anxiety.

Light at night also suppresses melatonin, a hormone vital for sleep and with antioxidant properties. Reduced melatonin production may contribute to higher risks of certain cancers, including breast and prostate cancer. To improve sleep, it’s recommended to create a dark, quiet, and cool environment, use blackout curtains, limit electronic devices before bed, and avoid unnecessary lighting. If a nightlight is needed, choose dim red or amber lights, which minimally impact melatonin.

Prioritizing darkness during sleep is a simple step to enhance sleep quality and support long-term health. Small nightly changes can make a big difference…

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