Exposure to blue light can disrupt the circadian rhythm and create damage in skin cells, according to a study in the International Journal of Cosmetic Science.
The coloured light has been found to trigger cells in the skin to ‘think’ its daytime, even at night.
Like other processes in the body, the skin is focused on repairing damage during the night and preparing for the next morning.
This study measures the skin cell damage over different times of the day when exposed to blue light.
Findings show an increase in reactive oxygen species (ROS) production, DNA damage and inflammatory mediators, all of which have been shown to accelerate the ageing process.