The number of older Americans is rising, so the number of people with dementia is predicted to increase. However, some studies have shown that incidence rates of dementia — meaning new cases in a population over a certain period of time — have decreased in some locations, including in the United States. Based on observational studies, factors such as healthy lifestyle behaviors and higher levels of education may be contributing to such a decline. But the cause and effect is uncertain, and such factors need to be tested in a clinical trial to prove whether they can prevent dementia.
A review of published research evaluated the evidence from clinical trials on behavior and lifestyle changes to prevent or delay Alzheimer’s or age-related cognitive decline. The review found “encouraging but inconclusive” evidence for three types of behavioral changes (called interventions): physical activity, blood pressure control, and cognitive training. The findings mean that interventions in these areas are promising enough that researchers should keep studying them to learn more. Researchers continue to explore these and other interventions to determine whether — and in what amounts or forms — they might prevent dementia.
Although there is no effective treatment or proven prevention for Alzheimer’s and related dementias, in general, leading a healthy lifestyle may help address risk factors that have been associated with these diseases.
Control high blood pressure. High blood pressure, or hypertension, has harmful effects on the heart, blood vessels, and brain, and increases the risk of stroke and vascular dementia.
Manage blood sugar. Higher than normal levels of blood sugar, or glucose, can lead to diabetes and may increase the risk of heart disease, stroke, cognitive impairment, and dementia.
Maintain a healthy weight. Being overweight or obese increases the risk for related health problems such as diabetes and heart disease. Being active and choosing healthy foods can help maintain a healthy weight.
Eat a healthy diet. Aim for a mix of fruits and vegetables, whole grains, lean meats and seafood, unsaturated fats such as olive oil, low-fat or nonfat dairy products, and limit other fats and sugars.
Keep physically active. Physical activity has many health benefits, such as helping to prevent being overweight and having obesity, heart disease, stroke, and high blood pressure.
Stay mentally active. Lots of activities can help keep your mind active, including reading, playing board games, crafting or taking up a new hobby, learning a new skill, working or volunteering, and socializing.
Stay connected with family and friends. Connecting with people and engaging in social activities can prevent social isolation and loneliness, which are linked to higher risks for cognitive decline and Alzheimer’s disease.
Treat hearing problems. Hearing loss may affect cognition and dementia risk in older adults and can make it more difficult to interact with others.
Sleep well. Sleeping well is important for both your mind and body. Try to get seven to eight hours of sleep each night. Talk with your doctor if you are not getting enough sleep, sleeping poorly, or think you may have a sleep disorder.
Drink less alcohol. Drinking too much alcohol can lead to falls and worsen health conditions such as diabetes, high blood pressure, stroke, memory loss, and mood disorders. The National Institute on Alcohol Abuse and Alcoholism (NIAAA), part of the National Institutes of Health, recommends that men should not have more than two drinks a day and women only one. Learn more at NIAAA’s Rethinking Drinking website.
Stop tobacco use. At any age, stopping smoking can improve your health and lower the risk of heart attack, stroke, and lung disease.
