This One Sleep Mistake Is Destroying Millions of People

The Health Consequences of Inconsistency

Research on social jetlag has connected it to a remarkably broad range of health outcomes. Metabolic disruption — including increased risk of obesity and type 2 diabetes — is one of the most replicated findings. Cardiovascular risk markers worsen with greater sleep timing inconsistency.




Mood and mental health are affected, with higher rates of depression and anxiety observed in people with large social jetlag. Cognitive performance, immune function, and even gut microbiome health all show negative correlations with sleep timing inconsistency.