Casting a light on circadian disruptions. Scientists and laypeople alike have known for years that the consumption of alcohol interferes with the body’s biological ability to synchronize its daily activities with light. Disruptions of the body clock due to alcohol increase the risk of cancer, depression, and other health problems. Furthermore, a recent animal study showed that the effect of alcohol on sleeping patterns could be detected several days after the last drinking event. Alcohol’s chronobiological effects grow more profound as steady consumption continues. Previous research has demonstrated the disruptive function of alcohol on melatonin rhythms, body temperature and glucocorticoid release.