Later Breakfast Times in Older Adults Tied to Poorer Health and Slightly Higher Mortality Risk, Study Finds

A study led by researchers at Mass General Brigham found that older adults who eat breakfast later after waking are more likely to report depression, fatigue and oral health problems, and have a modestly higher risk of earlier death than peers who eat earlier.

The analysis, based on questionnaires and blood samples from nearly 3,000 U.K. residents with an average age of 64, examined the timing of meals relative to sleep. Investigators calculated intervals such as the time between waking and breakfast, between dinner and bedtime, and between breakfast and dinner to characterize participants’ daily eating schedules.

Lead author Hassan Dashti, a nutrition scientist and circadian biologist at Massachusetts General Hospital, said the findings point to changes in meal timing as a potential, easy-to-monitor marker of overall health. “Our research suggests that changes in when older adults eat, especially the timing of breakfast, could serve as an easy-to-monitor marker of their overall health status,” Dashti said.

On average, participants reported eating breakfast roughly half an hour after waking, but individuals whose first meal came later in the morning were more likely to report symptoms of depression and greater fatigue. The later breakfast timing also correlated with self-reported problems with oral health. In statistical analyses, those with later wake-to-breakfast intervals showed a modestly higher risk of earlier death during the follow-up period than those with earlier breakfast timing.

The research team combined self-reported sleep and meal-timing data with blood analyses to explore links between daily schedules and health measures. Investigators emphasized that the study describes associations rather than causation: it did not determine that eating breakfast later causes mood, energy or oral-health problems, or that it directly raises mortality risk.

Researchers noted several possible explanations for the observed relationships. Changes in meal timing may reflect underlying health conditions, sleep disturbances, medication schedules or changes in appetite that accompany aging. Those shifts, rather than meal timing itself, could be driving the associations with mental and physical health indicators and mortality. The investigators also accounted for other timing measures, such as the interval from dinner to bedtime, to better isolate patterns specific to morning eating.

Experts not involved in the study have previously linked meal timing and circadian rhythms to metabolic and cardiovascular outcomes, and interest has grown in whether timing of food intake influences health independently of what people eat. This study adds evidence about how meal timing patterns change with age and how those changes align with common health complaints in older adults.

The authors called for further research to clarify mechanisms and to determine whether monitoring or modifying meal timing could help identify or improve health problems in older adults. They also highlighted the need for replication in larger and more diverse populations and for studies that can establish cause and effect.

Policy and clinical implications remain tentative. For now, the researchers suggested clinicians might consider asking older patients about changes in daily routines, including when they eat breakfast, as part of routine assessments of mood, energy and oral health. The study underscores the complex ways daily routines interact with aging and health, and it encourages additional investigation into whether simple behavioral markers can signal emerging health issues.