Uploaded June 2025 | Updated September 2026, 1 week ago
Why does summer mess with your sleep?
The answer lies in photochemistry—the way light affects the chemicals in your brain.
During the summer solstice, the UK can get up to 17 hours of daylight. That sunlight delays melatonin, the hormone that tells your body it's time to sleep. More light = less melatonin = harder to wind down at night.
Why does summer mess with your sleep?
The answer lies in photochemistry—the way light affects the chemicals in your brain.
During the summer solstice, the UK can get up to 17 hours of daylight. That sunlight delays melatonin, the hormone that tells your body it's time to sleep. More light = less melatonin = harder to wind down at night.
