Protecting Brain Health as You Age
Getting older affects the brain just like it affects the rest of the body. After age 40, the brain shrinks by an average of 5% per decade, and that change can contribute to memory problems and weaker focus.
For some people, this decline becomes more serious and may develop into dementia, including conditions such as Alzheimer’s disease.
The good news is that dementia does not have to be seen as an unavoidable part of aging. There is still no guaranteed way to stop memory decline or dementia completely, but evidence suggests that certain everyday habits may help slow memory loss.
Why Brain Decline Happens
Some lifestyle factors are scientifically linked to mental decline. That means daily choices can play a role in how well the brain functions over time.
If you want to stay mentally sharp and support your memory as you age, creating a brain-friendly lifestyle is an important step.
1. Get Quality Sleep
Sleep supports many parts of health, including the brain.
A 2020 Harvard study found that poor sleep and sleep disruption were linked to the development of dementia. The researchers also reported that inadequate sleep may contribute to the progression of Alzheimer’s disease.
In that study, 2,800 adults over age 65 tracked their sleep through self-reports over 2 years. Those who slept less than 5 hours per night had twice the risk of dementia. The study also found that people with poor-quality sleep were more likely to die within 5 years.
By contrast, better sleep habits were associated with stronger brain function, which may help protect memory and lower the risk of Alzheimer’s disease.
Poor sleep is especially common in older adults, so both sleep amount and sleep quality matter.
Tips to improve sleep quality
- Turn off electronic devices and keep them out of the bedroom
- Use a comfortable and appropriate mattress
- Keep a consistent sleep schedule
- Exercise during the day
- Relax on purpose and release tight muscles before bed
2. Eat a Heart-Healthy Diet
What you eat does not only affect sleep and general wellness. It also matters for brain health.
There is growing evidence that food choices and overall eating patterns influence memory and cognitive function as people get older.
One reason is that blood pressure is closely connected to brain health. Although the brain makes up only 2% of body weight, it receives 15% to 20% of the body’s blood supply. Because of that, a diet that supports the heart may also support the brain.
A heart-healthy eating pattern can help lower the risk of conditions such as high blood pressure and high cholesterol, both of which are known to raise the risk of cognitive decline later in life.
An observational study in Hawaii followed more than 3,000 men with an average age of 78. Researchers found that men who had higher blood pressure 20 years earlier were more likely to have poor cognitive function later on. For every 10-mmHg increase in systolic blood pressure, there was a 9% increase in poor brain health.
Eating patterns linked to heart and brain health
- DASH diet: designed for people with hypertension
- Mediterranean diet: known for heart and overall health benefits
- MIND diet: developed from DASH and Mediterranean eating patterns and specifically designed to help protect the aging brain
There are also foods known to clog arteries and raise the risk of heart attacks and strokes. Avoiding those foods may help protect both heart health and brain health.
3. Quit Smoking
If there is one habit to leave behind for better brain health, smoking is a major one.
Strong evidence shows that smoking may increase the risk of cognitive decline and dementia.
Smokers are estimated to have a 30% to 50% higher risk of dementia compared with non-smokers.
Some research also suggests that 11% of Alzheimer’s disease cases in the U.S. may be linked to smoking. The same research estimated that reducing smoking by 25% could prevent more than 1 million cases of Alzheimer’s disease worldwide.
Even if you do not smoke, second-hand smoke can still raise your risk.
The Bottom Line
Memory decline may become more common with age, but some daily habits can make a difference. Poor sleep, unhealthy eating patterns, high blood pressure, and smoking are all linked to worse brain health over time.
Focusing on better sleep, a heart-healthy diet, and quitting smoking may help support memory and protect cognitive function as you get older.
Consult a healthcare professional before making changes.
