Alzheimer's and dementia are affecting an increasing number of older people . The good news is that the scientific community is relentlessly pursuing a cure for these disorders that continue to claim so many lives, and according to forecasts, an increasingly effective solution could emerge in the not-too-distant future.
However, the fact that there is still no definitive cure does not mean that people cannot do anything to prevent its development or reduce its likelihood. Lifestyle has a significant influence on brain health , and it is now known that certain habits can delay cognitive decline, minimize the risk of Alzheimer's and other dementias, and even maintain functional independence for longer.
Below, we offer a series of habits that, according to scientists, help minimize the risk of Alzheimer's and dementia . These are simple measures, adaptable to almost any age, and which also improve cardiovascular, metabolic, and emotional health.
Why habits are so important in preventing Alzheimer's
Alzheimer's is a neurodegenerative disease that causes a progressive loss of memory, learning ability, and thinking skills. It usually manifests more frequently in old age, although it can appear at somewhat younger ages. Age and certain genetic factors are non-modifiable risk factors , but there are many other factors that do depend on our habits.
It is now widely accepted that what is good for the heart is also good for the brain . Keeping hypertension, diabetes, cholesterol, and obesity under control, quitting smoking, and avoiding a sedentary lifestyle reduces the risk of cardiovascular disease and, at the same time, decreases the likelihood of developing dementia. Numerous studies estimate that a significant proportion of Alzheimer's cases could be related to lifestyle factors and, therefore, be somewhat preventable.
It's especially important to start taking care of these aspects from middle age, although it's never too late to adopt healthy habits . Even in later stages, they can help slow decline, improve mood, and promote a better quality of life.
Physical exercise to protect the brain
Regular exercise is key. Research shows that good physical fitness in later life can reduce the risk of dementia. If you're over 45, it's very important to get involved in some form of physical activity, even if you haven't exercised regularly before.
One of the most popular activities among older adults is brisk walking , as it's a simple yet highly effective exercise for improving cardiovascular and brain health. Walking, climbing stairs, strolling in nature or around town, and staying active throughout the day helps improve blood flow to the brain, control weight, and reduce blood pressure.
In addition to walking, other types of activity adapted to each person are recommended, such as moderate aerobic exercise (stationary cycling, gentle swimming, dancing), light strength exercises to maintain muscle mass and autonomy, and low-impact and balance practices such as yoga or tai chi, which contribute to reducing stress and improving coordination.
Avoiding a sedentary lifestyle also helps keep diabetes, obesity, and high cholesterol at bay —risk factors linked to the development of Alzheimer's and other dementias. The key is consistency: small doses of exercise almost daily are more beneficial than sporadic bursts of exertion.
Food and nutrients that take care of memory
When it comes to maintaining a healthy mind as we age, another factor whose influence is undeniable is diet. Eating a balanced diet , rich in fruit, vegetables, lean protein, and healthy fats, reduces inflammation while providing a steady source of energy for the mind.
A well-studied dietary pattern is the Mediterranean diet , based on a high consumption of vegetables, fresh fruit, legumes, whole grains, extra virgin olive oil, nuts, and oily fish, with moderate consumption of red meat and processed foods. This type of diet provides antioxidants, omega-3 fatty acids, B vitamins, and vitamin E , all of which are associated with reduced cognitive decline.
The brain contains cells called glial cells , which are associated with the elimination of toxins and may play a role in the development of Alzheimer's disease. Foods such as soy , omega-3-rich fish , ginger , green tea , blueberries , and other berries may protect glial cells from damage and thus help prevent Alzheimer's by reducing oxidative stress and inflammation.
It has also been observed that certain micronutrients are particularly important. Vitamin E , found in nuts, seeds, and quality vegetable oils, helps protect neurons from oxidative damage. Vitamin B12 and other B vitamins, found in lean meats, fish, eggs, dairy products, and legumes, are essential for communication between neurons. Furthermore, maintaining adequate levels of vitamin D , through moderate sun exposure and foods such as fatty fish or fortified dairy products, has been associated with improved cognitive function.
In general, a diet low in saturated fats and highly processed foods is recommended , reducing excess sugars, red meat, processed meats, butter, and dairy fats. Opting for fresh, seasonal, and minimally processed products is a fundamental step in caring for the brain and the vascular system that nourishes it.
Train the mind and keep it constantly active
Constantly stimulating the mind is another fundamental pillar. Mental activity will help prevent the brain from atrophying or aging rapidly, since cognitive stimulation is associated with less decline in the hippocampus , a key area for memory and one of the first to be affected by Alzheimer's.
Activities such as frequent reading , solving crossword puzzles or Sudoku, learning a new language , playing chess , playing a musical instrument, participating in workshops or courses, and other hobbies that require attention, memory, and reasoning help maintain healthy neural connections. Setting small intellectual challenges regularly seems especially useful for strengthening cognitive reserve.
The mind is also trained through daily routines : organizing your schedule, making a shopping list, planning a trip, managing household finances, or taking on small responsibilities all encourage the use of memory and executive functions. Adapting these tasks to each person's level allows you to keep your brain active without causing frustration.
In people with mild cognitive impairment or high risk, structured cognitive stimulation programs led by professionals can be very helpful, combining memory, language, attention and orientation exercises with group dynamics that also integrate the social component.
Restful sleep, stress management, and an active social life
Getting restful sleep each night is essential for brain health. During sleep, the brain processes information from the day, consolidates memories, and eliminates waste products. Sleeping a sufficient number of hours of good quality sleep is associated with a lower risk of cognitive decline, while chronic insomnia and frequent sleep interruptions can promote inflammation and neuronal damage.
Short naps can also be beneficial if they help restore energy without interfering with nighttime sleep. Maintaining regular sleep schedules, creating a calm bedroom environment, and avoiding screens and stimulants before bed are simple steps to improve sleep hygiene.
On the other hand, chronic stress has a very negative impact on the brain. Elevated and sustained levels of stress hormones are linked to a greater risk of anxiety, depression, hypertension, and memory problems. Incorporating relaxation techniques, meditation, deep breathing, or yoga can help reduce daily tension, promote mental clarity, and protect neurons.
An active social life is another habit that science has linked to a reduced risk of developing dementia and Alzheimer's. Connecting with family and friends, participating in community activities, volunteering, or joining cultural or sports groups involves conversing, listening, remembering, developing arguments, and sharing emotions, which keeps neural connections active and combats isolation, one of the greatest threats to mental health in old age.
Strengthening social relationships also provides emotional support, reduces feelings of loneliness, and improves mood—factors that also influence the progression of cognitive decline and the ability to maintain healthy habits in the long term.
Taken together, the combination of good nutrition, regular exercise, mental stimulation, quality sleep, stress management, and social contact constitutes a comprehensive strategy that can help reduce the risk of dementia and Alzheimer's and age with greater autonomy, energy, and well-being, even when there are genetic or age-related factors that cannot be modified.