Daylight Benefits

 Scientists found that daylight can strengthen the infection-fighting power of neutrophils, the most common white blood cells in our body.

New research shows that neutrophils have internal circadian clocks—biological timers—that get activated by light during the day, boosting their ability to kill bacteria.

Using transparent zebrafish, whose genetics are similar to humans, researchers directly observed how daylight synchronizes these immune cells to work harder when the body is most active and likely to encounter infections.

This natural alignment between daylight and immune response is thought to be an evolutionary adaptation to protect us better during daytime activity.

The study suggests that targeting these circadian clocks in neutrophils could lead to new therapies that enhance immune function, especially in inflammatory diseases.

Scientists say this discovery opens exciting possibilities to develop drugs that boost infection defense by optimizing the timing and function of immune cells with light.