Impact of Meal Timing on Mortality and Life Expectancy

The Importance of Meal Timing

While traditional nutrition advice emphasizes what is consumed, recent research suggests that when you eat might also play a significant role. A study analyzing over 31,000 adults in the U.S. found correlations between the timing of meals and differences in mortality risk and life expectancy.

Findings on Breakfast Timing

The study, published in the European Journal of Clinical Nutrition, highlighted breakfast timing as crucial. Adults who ate breakfast between 7 and 8 a.m. had lower mortality risks compared to those who began eating later. Delaying breakfast resulted in a steady increase in mortality risk, particularly significant among those who consumed their first meal after noon, where deaths from any cause increased by 29%, and cardiovascular deaths soared by 43%.

This elevated risk was not exclusive to those who skipped breakfast entirely. Even those whose first meal occurred between 10 a.m. and noon saw a 19% increase in all-cause mortality and a 59% rise in stroke-related deaths compared to early breakfast eaters.

Influence of Dinner Timing

Meal timing in the evening also showed a substantial impact on health outcomes. Contrary to the notion that earlier dinner times are optimal, the study identified the 7 to 8 p.m. window as having the lowest mortality risk. Eating before 7 p.m. led to a 13% increase in the risk of death from any cause, and consuming food after midnight was associated with a 27% higher risk of death from any cause and a 51% higher risk from heart disease.

Effects on Life Expectancy

The timing of meals also affected life expectancy estimates for adults aged 50 and older. Eating breakfast between 8 and 10 a.m. was linked to a decrease of approximately 0.9 years in life expectancy, while starting meals after noon was associated with a reduction of about 2.5 years. At day’s end, dinner before 7 p.m. correlated with 1.2 fewer years of life expectancy, and post-midnight dining was linked to a decrease of 2.4 years.

Study Methodology

Participants in the study provided detailed 24-hour dietary records through the National Health and Nutrition Examination Survey from 1999 to 2018. Researchers connected these records with the National Death Index, tracking participant deaths until December 31, 2019, with an average follow-up period of 8.6 years.

It’s essential to note that the study, while observational, cannot definitively prove that meal timing directly affects lifespan or cardiovascular health. It identifies associations but not causation. However, these insights suggest that meal timing could contribute to discussions on healthy aging and long-term disease prevention.

Reference: Wen Hu et al, Meal timing and eating window with all-cause and cardiovascular mortality and life expectancy: population-based cohort study, European Journal of Clinical Nutrition (2026). DOI: 10.1038/s41430-026-01796-1. For more information, contact Newsweek editors Kara Dolman and Gray R. Thomas.