Aging is the strongest risk factor for gradual changes in cognitive function. Age-related cognitive decline may involve reduced working memory, slower processing of information, and greater difficulty handling several tasks at the same time. These changes can begin as early as the 40s and often become more noticeable after age 65.
Importantly, normal age-related cognitive decline is different from mild cognitive impairment and Alzheimer’s disease. However, many of the lifestyle strategies used to support healthy brain aging are also incorporated by integrative physicians when addressing more serious cognitive concerns.
The brain has a remarkable ability to adapt. It can form new connections between neurons, reorganize neural pathways, and, in certain regions, generate new neurons. Supporting these built-in repair and adaptation mechanisms requires adequate nutrition, healthy blood flow, good metabolic function, and control of excessive inflammation.
When I look at how the brain does this, I see design. It was built by God to keep rewiring itself across a lifetime, and it responds to what we give it.
Diet, regular exercise, restorative sleep, and other healthy lifestyle practices can therefore have an important influence on how well the brain functions with advancing age.
Certain substances and medications can also interfere with cognition, especially with heavy or prolonged use. Alcohol, cannabis, benzodiazepines, opioids, and cocaine have all been associated with cognitive impairment when abused.
A number of prescription and over-the-counter medications have also been linked with cognitive problems in some individuals, including certain antiseizure drugs, antidepressants, antipsychotics, antiparkinsonian medications, antihistamines, anticholinergic bladder medications, glucocorticoids, proton pump inhibitors, and some chemotherapy drugs. Other medication classes have also been investigated for possible cognitive effects. If you take medications long-term, review them periodically with your health care provider rather than stopping them on your own.
Physical inactivity is associated with a greater risk of cognitive decline and dementia, while regular exercise appears to support both brain structure and function.
Exercise may improve blood flow to the brain, glucose regulation, cardiovascular health, stress-hormone balance, and neuroplasticity while helping reduce excessive inflammation. Research also suggests that physical activity may help limit age-related brain atrophy and influence processes involved in beta-amyloid accumulation.
The body was designed to move, and the brain benefits when it does.
Both aerobic exercise and resistance training should ideally be included. The Centers for Disease Control and Prevention recommends at least 150 minutes of moderate-intensity activity or 75 minutes of vigorous activity each week. This activity can be divided into shorter sessions throughout the week.
The brain also benefits from regular intellectual stimulation. Activities such as reading, crossword puzzles, computerized cognitive exercises, board games, and learning new skills may help preserve cognitive function and have been associated with a lower risk of dementia.
The key is to continue challenging the brain rather than allowing mental activity to become increasingly limited with age.
Maintaining relationships and regular social interaction is another important part of healthy brain aging. Social isolation has been associated with later cognitive decline and changes in brain structure and function. Even communication through video calls and other internet-based interactions may provide cognitive benefits when in-person contact is limited.
Age-related memory decline is influenced by many factors, including physical inactivity, poor nutrition, chronic inflammation, medication effects, lack of mental stimulation, and social isolation.
Because brain health depends on multiple interconnected systems, I recommend that my patients use all of these strategies together—regular aerobic and resistance exercise, a nutrient-rich diet, careful review of medications and substances, ongoing mental stimulation, and regular social interaction—to help prevent and improve age-related memory impairment.
I think of these steps as working with the way you were designed by God. The brain has layered systems for repair and adaptation. My job is to help you support them.
Supporting the brain in these ways gives it the best opportunity to maintain healthy function, adaptability, and resilience as we age.
