Nighttime light exposure epigenetically changed genes in sperm/ovaries causing offspring to have immune dysfunction.

Disruptions in circadian rhythm have been shown to have many negative health consequences such as increased type 2 diabetes risk and cancer risk. It has been known that circadian rhythm regulates roughly 15% percent of the human genome but the fact that it also can epigenetically change genes, including those in sperm and egg DNA, means that some of these negative health consequences may be passed on to future generations.