July 28, 2026
A recent study indicates that the timing of meals may play a significant role in supporting brain health as people age.
According to early research from Rutgers University, presented at the NUTRITION 2026 conference of the American Society for Nutrition, limiting food intake to an eight to nine-hour window each day could help maintain critical thinking and problem-solving skills.
Researchers observed improved cognitive test results in women aged 50 to 79 who are overweight or have obesity when they constrained their eating to this limited timeframe. This was compared to those who followed the same reduced-calorie regimen but spread their meals over a standard twelve-hour day.
While these findings haven’t yet passed the rigorous peer review process necessary for scientific publication, the researchers emphasized the small sample size of 47 participants, suggesting more extensive studies are needed to verify these results.
This study contributes to a growing body of evidence that highlights the importance of when people eat—not just what they consume—in relation to long-term health and cognitive function.
What the study revealed
The six-month trial involved 47 women, all aged between 50 and 79. Participants were asked to cut their daily calorie intake by around 500 calories.
Of these, 26 women adhered to a time-restricted eating plan, typically consuming their meals between 10 a.m. and 6 p.m. Their average eating duration was about 8.2 hours, while those with a more standard eating schedule averaged 12.3 hours.
At the study’s conclusion, both groups lost roughly 15 pounds. However, the time-restricted group demonstrated notably enhanced performance on tests for spatial planning and problem-solving. They also tended to make fewer mistakes on memory assessments, although these differences weren’t statistically significant. Both groups showed no substantial distinctions in reaction time or multitasking abilities.
Potential benefits of meal timing
“Weight loss can help mitigate some cognitive decline associated with aging, but our data indicates that further benefits may arise if eating is limited to an 8-9 hour period, especially if meals are halted four hours before bedtime,” said Sue Shapses, the study’s lead investigator and a professor at Rutgers.
Shapses noted that while the cognitive improvements were modest, they could indicate that participants were better at recalling everyday information with fewer memory and attention-related errors.
The researchers plan to investigate further why meal timing might affect brain health, exploring factors like circadian rhythms, inflammation, metabolism, and how the body senses nutrients.
Wendy Hall, a professor of nutritional sciences at King’s College London and not involved with this research, commented on the preliminary nature of these findings, stressing that larger, peer-reviewed studies are essential to determine if the observed cognitive enhancements are clinically significant.
