Muhammad Aman Ullah
Publication Date: July 27, 2026
The True Post — A new preliminary study suggests that limiting meals and snacks to an 8–9 hour daily eating window and avoiding food for at least four hours before bedtime may help protect brain function and lower the risk of dementia in older adults.
Researchers say the findings indicate that time-restricted eating could benefit not only physical health but also cognitive performance. However, experts caution that larger studies are needed before firm conclusions can be drawn.
Study Finds Better Cognitive Performance in Older Women
The research focused on older women who were overweight or living with obesity. Participants followed different eating schedules, allowing researchers to compare their cognitive performance.
The study found that women who consumed all of their daily meals within an 8–9 hour period performed better on tests measuring:
- Memory
- Attention
- Learning ability
- Overall cognitive function
compared with those who ate over a longer period throughout the day.
Experts Say the Findings Are Preliminary
Researchers emphasized that this was a pilot study involving a relatively small number of participants.
Because of the limited sample size, scientists say the results should be viewed as preliminary rather than conclusive. They recommend larger clinical studies involving people of different ages, sexes, and medical backgrounds to confirm whether the same benefits apply more broadly.
Why Time-Restricted Eating May Benefit the Brain
According to Professor Sue Shapses, a nutrition expert at Rutgers University, weight loss itself may help slow age-related cognitive decline.
She added that restricting food intake to an 8–9 hour window and avoiding meals for several hours before sleep may provide additional brain-health benefits by:
- Helping regulate the body’s internal biological clock
- Improving blood sugar control
- Reducing chronic inflammation
- Supporting healthy metabolism
These factors are believed to contribute to better long-term brain function.
Dementia Remains a Growing Global Health Challenge
Medical experts say dementia is one of the leading causes of death and disability among older adults worldwide.
The condition gradually affects:
- Memory
- Thinking ability
- Decision-making
- Communication skills
- Daily living activities
Millions of families worldwide are affected by dementia, making prevention and early intervention increasingly important.
Healthy Lifestyle Can Reduce Dementia Risk
Researchers note that while age and genetics cannot be changed, many lifestyle-related risk factors can be managed.
Experts recommend:
- Eating a balanced diet
- Exercising regularly
- Getting adequate sleep
- Keeping the brain mentally active
- Avoiding smoking
- Maintaining a healthy body weight
These habits may significantly reduce the likelihood of cognitive decline later in life.
Obesity Linked to Higher Dementia Risk
The study also highlighted that obesity during middle age is associated with approximately a 30% higher risk of developing dementia later in life.
Researchers say that if future studies confirm these findings, time-restricted eating could become a simple, affordable, and practical strategy for supporting healthy brain aging.
Important Takeaway
While the results are promising, health experts stress that people should not consider time-restricted eating a proven treatment or guaranteed method to prevent dementia. Instead, it should be viewed as one potentially beneficial lifestyle habit that may complement a healthy diet, regular exercise, quality sleep, and routine medical care.
