Researchers have found preliminary evidence that time-restricted eating may help preserve mental function in older age, according to a small clinical trial presented at a nutrition conference. The study involved 47 women aged 50 to 79 who were living with overweight or obesity and were asked to reduce their daily calorie intake by 500 calories over a six-month period. Within the group, 26 participants were instructed to consume all meals and snacks within a nine-hour window, typically between 10am and 6pm, while the remaining participants spread their eating over approximately 12 hours.
Both groups achieved similar weight loss, averaging about 7 kilograms, but cognitive testing revealed differences in mental performance. Participants in the restricted eating window performed better on spatial planning and problem-solving tasks compared with those who ate over a longer timeframe. The research also suggested potential improvements in memory and learning, though results on multitasking and reaction time tests were comparable between groups. Researchers described the observed effects as modest but potentially meaningful for everyday cognitive function.
The underlying mechanisms for these potential benefits remain unclear, though experts suggest they may involve the interaction of circadian rhythms, metabolic processes and inflammation levels. Broader research indicates that many populations consume food over a 14-hour period daily, leaving only 10 hours without eating overnight. Studies have shown that finishing meals earlier in the day is associated with improvements in weight management, blood pressure and metabolic markers.
Experts note that the findings are preliminary and require confirmation through larger, peer-reviewed studies before drawing definitive conclusions about cognitive benefits. Future research will investigate the timing of meals alongside dietary composition to better understand how eating schedules may influence brain health across different age groups.
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