Time-Restricted Eating: A Potential Shield for the Aging Brain
A groundbreaking pilot study presented at NUTRITION 2026 — the flagship annual meeting of the American Society for Nutrition — suggests that time-restricted eating could be a powerful tool against cognitive decline and dementia in older women.
The six-month trial, led by Professor Sue Shapses, PhD, RD, of Rutgers University and Rutgers-RWJ Medical Center, enrolled 47 women aged 50 to 79 who were overweight or obese. Participants followed a 500-calorie daily deficit, with one group also limiting their eating to an 8–9 hour daily window, stopping food intake at least four hours before bedtime. This was compared to a standard 12-hour eating window.
The results were striking. Those who compressed their eating window showed significantly greater improvements in spatial planning and problem-solving tests, even though both groups lost an average of 15 pounds. Researchers believe that aligning meals with circadian rhythms may actively protect executive function and spatial memory in populations already at elevated risk for Alzheimer’s disease.
“Losing weight alone will ward off some of the aging-related cognitive decline,” said Shapses, “and these data suggest that there may be additional benefits if you stop eating 4 hours prior to going to sleep and reduce food intake to 8–9 hours per day.”
The findings are preliminary and have not yet undergone full peer review, but experts say the implications for women’s wellness and preventive brain health are profound.
Source: EurekAlert! – American Society for Nutrition, July 26, 2026