Eating breakfast between 7:00 a.m. and 8:00 a.m. and dinner by 8:00 p.m. is associated with longer life expectancy, according to research on 31,000 Americans.
The findings, published in the European Journal of Clinical Nutrition, analyzed dietary timing and health outcomes in adults over 40 years old who were followed for an average of 8.6 years.
Researchers concluded that individuals maintaining this daily eating window demonstrated the most favorable longevity indicators compared to those with delayed or late-night meal schedules.
Delaying the first meal of the day until after 12:00 p.m. was associated with a 29 percent higher risk of death from all causes compared to eating during the morning window.
The study also found that participants who regularly started eating after noon faced a 46 percent higher risk of mortality from cardiovascular disease.
Cardiovascular disease encompasses disorders of the heart and blood vessels, including coronary heart disease, stroke, and heart failure, which represent leading causes of mortality worldwide.
Mortality risks and life expectancy
Eating late at night was similarly linked to adverse health outcomes. Participants who consumed meals after midnight showed a 27 percent higher risk of all-cause mortality.
For cardiovascular disease specifically, eating after midnight was associated with a 38 percent increase in the risk of death compared to the benchmark eating schedule.
The researchers calculated that individuals who regularly delayed their first meal until after 12:00 p.m. had an average life expectancy at age 50 that was 2.5 years lower.
Participants who regularly ate after midnight saw a similar reduction, with their average life expectancy at age 50 reduced by approximately 2.4 years.
Life expectancy at age 50 is a standard demographic and medical metric that estimates the remaining years a person of that age is expected to live based on population mortality statistics.
Timing balance and study limitations
The researchers also identified a U-shaped relationship regarding the final meal of the day, noting that ending meals too early was also problematic.
Finishing the last meal before 7:00 p.m. was associated with an elevated risk of death, indicating that both excessively early and delayed dinner times carry heightened mortality risks.
In observational health studies, a U-shaped relationship indicates that risks increase at both extremes of a behavior, leaving a moderate range as the most favorable outcome.
The study authors noted that while the research establishes a clear statistical link between meal timing and longevity, it does not prove that meal schedules directly cause the differences in lifespan.
The European Journal of Clinical Nutrition is an international peer-reviewed journal focused on human nutrition, clinical metabolism, and dietary epidemiology.
The publication builds on earlier scientific findings regarding diet and health, including previous research establishing that regularly skipping breakfast can increase the risk of psychological problems.
