Forks up: Study finds possible brain benefits for older adults from shorter eating window

A small pilot study suggests that time-restricted eating may help protect thinking skills in older women with overweight or obesity, according to The Guardian. Researchers found that women who ate within an eight- to nine-hour window and stopped eating four hours before bed did better on some cognitive tests than women who spread meals across about 12 hours.

The trial followed 47 women ages 50 to 79 for six months as part of a weight-loss program. All participants were told to cut 500 calories a day, The Guardian confirmed, and both groups lost about 15 pounds on average. The women in the shorter eating-window group performed better on tests of spatial planning and problem solving, and they made fewer mistakes on memory and learning tasks, according to the researchers. 

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Sue Shapses of Rutgers University, the study’s principal investigator, said, per Science Daily, “Losing weight alone will ward off some of the aging-related cognitive decline, 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, compared to the usual eating window of 12 hours per day.”

Why timing may matter for the aging brain

The study was presented at NUTRITION 2026, the annual meeting of the American Society for Nutrition in Maryland, Science Daily reported. Researchers said the results are preliminary and need to be tested in larger trials before they can be treated as proof.

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Experts also say the possible benefit may come from more than weight loss alone. Professor Wendy Hall, head of nutritional sciences at King’s College London, stated in The Guardian that time-restricted eating is a plausible way to support cognitive health in midlife and older adults with overweight because it may improve blood sugar control, vascular function and inflammation.

The researchers plan to study why meal timing could affect the brain. They said possible explanations include circadian rhythms, metabolism and inflammation. If confirmed, the findings could add to growing evidence that when people eat may matter as much as what they eat.