Eating within a shorter daily window may give the aging brain a modest boost beyond weight loss alone, according to a small six-month trial presented at NUTRITION 2026.
The Research
Researchers led by Sue Shapses, PhD, RD, professor at Rutgers University and Rutgers-RWJ Medical Center, followed 47 women ages 50 to 79 who had overweight or obesity. All participants were instructed to cut 500 calories per day. Twenty-six women also limited their eating to about 8 to 9 hours a day (typically 10 a.m. to 6 p.m.), while the rest ate over roughly 12 hours.
After six months, both groups lost about 15 pounds on average. However, the time-restricted group scored significantly better on tests measuring spatial planning and problem-solving. They also tended to make fewer mistakes on memory and learning tests, though that difference wasn't statistically significant. Reaction time and multitasking showed no differences.
“There was a modest effect of time-restricted eating to improve spatial planning and problem-solving and on reducing errors related to memory and learning,” Shapses said. “These outcomes suggest a better ability to remember information during everyday tasks.”
Why It Matters
Alzheimer’s and other dementias are rising as populations age, with women and people with overweight or obesity at higher risk. While lifestyle interventions like weight loss are known to help, this trial hints that meal timing could add extra cognitive protection. Possible reasons include interactions with circadian rhythms, inflammation, and metabolic health.
What You Can Do
Consider trying a daily eating window of 8–9 hours, such as eating between 10 a.m. and 6 p.m. Combined with a healthy, calorie-controlled diet, this pattern may support brain function as you age. Always consult a healthcare provider before major dietary changes.
Source: ScienceDaily Mind & Brain
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