Can Fasting Help Prevent Dementia?
As we age, many of us worry about developing dementia. But could something as simple as changing when we eat help protect our brains? Recent research suggests fasting might have benefits for brain health and cognition.
Fasting means going without food for set periods of time. Intermittent fasting involves limiting eating to certain hours of the day or certain days of the week. Some studies show these eating patterns may reduce inflammation, improve metabolism, and even stimulate the growth of new brain cells[1].
How might fasting affect dementia risk? When we fast, our bodies start using ketones for fuel instead of glucose. Some scientists think ketones provide better energy for brain cells and may help clear out harmful proteins that build up in dementia[1]. Fasting also seems to activate cellular “recycling” processes that remove damaged components, which could keep brain cells healthier[1].
Animal studies have found promising results. Mice on intermittent fasting diets showed less buildup of amyloid plaques in their brains – a hallmark of Alzheimer’s disease[3]. Fasting mice also performed better on memory tests[3].
But does this translate to humans? We don’t know for sure yet. A few small studies in people with mild cognitive impairment or early Alzheimer’s have shown some potential benefits of fasting[2]. Participants who fasted for 14 hours overnight had improvements in memory, thinking skills, and sleep quality after 3-6 months[2].
However, we need much more research before recommending fasting as a dementia prevention strategy. Large, long-term studies in humans are still lacking. Fasting can also have side effects and risks, especially for older adults or those with certain health conditions[1].
If you’re interested in trying intermittent fasting, talk to your doctor first. They can help you decide if it’s safe and appropriate for you. Other lifestyle factors like exercise, social connection, and mental stimulation are also important for brain health as we age[1].
While fasting shows some promise, there’s no magic bullet for preventing dementia. A healthy overall diet and lifestyle remain the best ways to keep your brain sharp. But stay tuned – we may learn more about fasting’s effects on the aging brain in coming years.
