Ensure room is completely dark/cool

How to do it

Make your bedroom pitch black by using blackout curtains, eye masks, or covering light sources; set the thermostat to 60-67°F (15-19°C) for a cool environment.

Why important

Darkness and cool temperatures boost melatonin production, improving sleep quality, reducing oxidative stress, and lowering risks of diabetes and heart disease. Done at bedtime to optimize recovery during sleep, leading to better mood, energy, and alertness the next day.

Detailed science

Darkness enhances melatonin secretion, which regulates sleep and has antioxidant properties, reducing oxidative stress and promoting health. Studies show that light exposure at night suppresses melatonin, increasing risks for metabolic disorders; cool environments decrease wakefulness and support deep sleep stages. Heat or cold exposure affects REM and slow-wave sleep, with room light suppressing melatonin by over 50%, causing hypoperfusion and fatigue. Melatonin combats oxidative stress and inflammation, restoring tissue function.

External links

• https://pmc.ncbi.nlm.nih.gov/articles/PMC3427038/
• https://pmc.ncbi.nlm.nih.gov/articles/PMC1114906/
• https://www.sciencedirect.com/science/article/abs/pii/S1095643313001037
• https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2017.00785/full
• https://onlinelibrary.wiley.com/doi/10.1111/jpi.12360