In a fascinating discovery, researchers have identified a rare genetic mutation that enables a small group of people to feel fully rested with only 3–4 hours of sleep per night — and with no negative consequences.
This mutation, which affects the DEC2 gene responsible for regulating the sleep-wake cycle, allows these so-called “natural short sleepers” to enjoy more efficient sleep and faster cellular repair compared to the average person.
While most people require 7–8 hours of sleep to function at their best, these individuals wake up refreshed and energized after just a few hours. Scientists caution, however, that this genetic gift is exceptionally rare.
Those without the mutation who attempt to limit their sleep could face harmful effects such as cognitive decline, hormonal imbalances, and overall sleep deprivation.
The findings highlight an important truth: when it comes to sleep, both quality and genetics can matter as much as sheer quantity.
