As we grow older, our brains age just like our bodies. Brain volume shrinks, and connections between neurons may weaken. These changes can lead to memory lapses, slower thinking, or difficulty learning new things. And as we age, the risk of dementia—including Alzheimer’s disease and vascular dementia—also increases.But that risk isn’t set in stone. Experts say you can take several steps to protect your brain and slow cognitive decline.“Even if you have a family history of dementia, there’s so much you can do to protect your brain,” said Joel Salinas, a neurologist, as quoted in The Washington Post.Up to Half of Dementia Cases May Be PreventableA 2024 report in The Lancet found that nearly 50% of all dementia cases worldwide could be delayed or prevented by making certain lifestyle and environmental changes. These include regular physical activity, a healthy diet, managing stress, and getting enough sleep.Let’s look at the most effective ways to support brain health.Key Habits to Keep Your Brain SharpStay Physically ActiveExercise is not only good for your body but also boosts brain health. People who exercise regularly tend to have larger brain volumes and a lower risk of dementia. Even mild activity like walking or gardening helps.“Those with consistent exercise routines tend to do the best,” said Salinas in The Washington Post.Experts recommend older adults aim for at least 150 minutes of moderate-intensity activity per week. This includes activities like speed walking, swimming, or even pickleball.Prioritize Heart HealthWhat’s good for the heart is good for the brain. Controlling blood pressure, cholesterol, and blood sugar levels, along with quitting smoking and maintaining a healthy weight, all reduce dementia risk.“Most dementia risk factors overlap with heart disease,” said Lon Schneider, a gerontology expert, as quoted in The Washington Post.Eat Smart for Brain HealthDiet also plays a critical role in cognitive aging. Diets rich in vegetables, fruits, whole grains, and healthy fats—like the Mediterranean and DASH diets—have been linked to better brain function and lower Alzheimer’s risk.One diet designed specifically for brain health is the MIND diet, a combination of Mediterranean and DASH diets. A 2023 study in JAMA Psychiatry found that those who closely followed the MIND diet had a lower risk of dementia.Stay ConnectedSocial engagement helps build “cognitive reserve,” supports healthy habits, and reduces stress. Loneliness and isolation are linked to faster cognitive decline.Older adults who maintain strong social ties—whether through family, friends, or community activities—are more likely to retain better memory and thinking skills.Protect Your Hearing and VisionHearing and vision loss often go untreated in older adults, yet both are linked to a higher risk of dementia. Hearing aids and regular eye checkups can help keep the brain active and socially engaged.“This is a tremendously active area of research,” said Susan Resnick of the National Institute on Aging, as quoted in The Washington Post.