Dementia is one of the most feared medical conditions in the world. Few diagnoses carry the same emotional weight. The possibility of gradually losing memories, language, independence, or recognition of loved ones can feel uniquely frightening because it appears to threaten something many of us assume is permanent: our identity.
Yet fear is not the only story emerging from dementia research. Scientists now understand far more about risk, diagnosis and prevention than they did a generation ago. Blood-based biomarkers are making Alzheimer’s disease easier to detect, new medications can modestly slow its progression in some people during its earliest symptomatic stages, and growing evidence suggests that a meaningful portion of dementia risk may be influenced by conditions we can change.
The 2024 Lancet Commission identified 14 potentially modifiable risk factors and estimated that addressing them across the course of a person’s life could prevent or delay nearly 45% of dementia cases. This does not mean that an individual can guarantee protection through perfect behaviour. Population-level estimates cannot predict one person’s future, and dementia can develop even in people who appear to do everything “right.” The finding does mean that dementia is not always an unavoidable consequence of aging and that prevention deserves far more attention than it commonly receives.
That raises an important question: if some of the strongest tools for protecting the brain are already available to us, how many people have been taught how to use them?
What Is Dementia?
Dementia is not one particular disease. It is a general term for a decline in memory, language, reasoning, behaviour or other cognitive abilities that becomes serious enough to interfere with daily life. Alzheimer’s disease is the most common cause, but dementia can also result from vascular disease, Lewy body disease, frontotemporal degeneration and several other conditions.
The symptoms do not look identical in everyone. Some people initially struggle to remember recent events. Others experience changes in language, planning, spatial awareness, personality or impulse control. A person may also have more than one form of brain pathology at the same time, which can make diagnosis and treatment especially complicated.
It is also important to distinguish dementia from ordinary forgetfulness. Misplacing a phone, forgetting why you walked into a room or struggling to recall a name does not automatically indicate a neurodegenerative disease. Stress, depression, poor sleep, medication, infection, pain, hearing loss and many other conditions can temporarily affect attention and memory. Persistent or worsening cognitive changes that interfere with ordinary activities deserve medical attention, but they cannot be diagnosed accurately through fear or self-observation alone.
Who Is Most at Risk?
Age is the strongest known risk factor for most forms of dementia. Risk rises substantially later in life, although dementia is not an inevitable part of aging. Some people maintain strong cognitive abilities into their nineties, while younger people can develop less common forms of dementia before age 65.
Genes also matter. The APOE ε4 variant, for example, increases the likelihood of developing Alzheimer’s disease, while rare genetic mutations can cause inherited forms of the disease. Genetic vulnerability is not the same as destiny, however. Many people who carry an increased-risk variant never develop dementia, and many people diagnosed with Alzheimer’s disease do not have a strong family history.
The broader picture includes far more than age and genes. The 2024 Lancet Commission identified lower educational opportunity, hearing loss, high LDL cholesterol, depression, traumatic brain injury, physical inactivity, diabetes, smoking, high blood pressure, obesity, excessive alcohol consumption, social isolation, air pollution and untreated vision loss as modifiable factors associated with dementia risk at different stages of life.
These factors are not distributed equally. Safe neighbourhoods, clean air, nutritious food, preventive healthcare, hearing aids, vision care, time for exercise and opportunities for education are not equally accessible to everyone. Dementia prevention is therefore not simply a matter of telling individuals to make better choices. Governments, healthcare systems, employers and communities also shape the conditions in which brain health is protected or neglected.
The deeper question is not only, “What should I do?” It is also, “What would make brain health realistically accessible to more people?”
What Are the Most Important Recent Breakthroughs?
For decades, Alzheimer’s treatment largely focused on managing symptoms after substantial damage had already occurred. That is beginning to change, although the word “breakthrough” must be used carefully. There is still no cure for Alzheimer’s disease, and no available treatment restores everything the disease has taken.
Lecanemab and donanemab are amyloid-targeting antibody treatments approved in the United States for people in the mild cognitive impairment or mild dementia stages of Alzheimer’s disease who have confirmed amyloid pathology. Clinical trials showed that these medications can slow decline modestly in selected patients, but they do not stop or reverse the disease. They can also cause serious adverse effects, including amyloid-related imaging abnormalities involving brain swelling or bleeding, so treatment requires careful assessment and monitoring.
Another major development is the growing clinical use of blood biomarkers. Tests measuring proteins such as phosphorylated tau may help determine whether Alzheimer’s-related changes are present without immediately requiring a spinal tap or expensive brain scan. Clinical guidelines published in 2025 support using qualifying blood tests in specialized-care settings as part of a comprehensive diagnostic process. They are not intended to replace a physician’s evaluation or to function as stand-alone screening tests for everyone who occasionally forgets something.
The significance of these developments is not that dementia has been solved. It is that earlier and more accurate identification may allow appropriate patients to receive treatment sooner, participate in clinical research and plan their care while they can still participate fully in important decisions.
At the same time, the most widely accessible brain-health interventions remain surprisingly ordinary. They are not futuristic procedures. They are small practices repeated often enough to influence the body, brain and surrounding environment over time.
Five Small Things That Can Have a Huge Impact
1. Move Your Body—and Dance Whenever You Can
Physical activity supports cardiovascular health, mobility and metabolic function, all of which are closely connected to the brain. It can help reduce several established dementia risk factors, including high blood pressure, diabetes, obesity and physical inactivity.
The problem is that conventional exercise advice often assumes access that many people do not have. A recommendation to join a gym is not especially useful when the membership is unaffordable, the facility has closed, the roads are icy, the neighbourhood feels unsafe or a person cannot leave home because of disability, illness or caregiving responsibilities.
Dancing offers a practical alternative. A person can put on music and move in a kitchen, bedroom or living room without equipment, transportation or special clothing. Movement can be adapted to the body that is available that day. It may involve full-body dancing, shifting weight while holding a counter, moving the arms while seated or simply following a rhythm with the hands and feet.
Dance is especially interesting because it asks the brain and body to perform several tasks together. A person responds to rhythm, coordinates movement, maintains balance, anticipates changes, recalls patterns and makes continual adjustments. Depending on the setting, dancing may also involve creativity, emotion and social connection.
Systematic reviews of randomized trials have found that dance interventions can benefit aspects of cognitive functioning in older adults, including some people with mild cognitive impairment. More recent comparative research has also suggested potential benefits for executive function and cognitive flexibility. The evidence does not establish dancing as a cure for dementia or prove that it is universally superior to every other form of exercise. It does support dance as a legitimate, cognitively engaging form of movement rather than merely entertainment.
Consider what becomes possible when exercise stops feeling like punishment. One favourite song may provide three or four minutes of movement. Three songs could create a brief daily practice. The activity does not have to be elegant, strenuous or visible to anyone else. The most useful form of movement is often the one a person can safely repeat.
People with serious balance problems, heart conditions or other physical limitations may need professional guidance before beginning a new activity. For many others, dancing at home can make daily movement more accessible when walking outdoors or attending a gym is unavailable.
2. Protect Your Hearing and Vision
Hearing and vision are sometimes treated as separate from brain health, yet both help the brain remain engaged with the surrounding world. When hearing becomes difficult, conversation requires greater cognitive effort. People may withdraw from social situations, misunderstand what is happening around them or gradually receive less stimulation. Untreated vision problems can likewise restrict reading, movement, social participation and independence.
Hearing loss and untreated vision loss are among the modifiable factors identified by the Lancet Commission. This does not mean that hearing aids or glasses can guarantee that dementia will never develop. It means that identifying and addressing sensory impairment may reduce avoidable strain and help people remain socially and cognitively involved.
A small action could be scheduling a hearing or eye examination, cleaning and consistently wearing prescribed devices, asking family members to reduce background noise during conversation or turning on adequate lighting at home. These interventions may look ordinary, but remaining connected to sound, language, faces and the physical environment gives the brain more opportunities to participate in life.
3. Care for Your Heart and Blood Vessels
The brain depends on a constant supply of oxygen and nutrients delivered through blood vessels. High blood pressure, diabetes, smoking, elevated LDL cholesterol and vascular disease can damage that system over time. The distinction between heart health and brain health is therefore less substantial than it first appears.
This does not require approaching every meal or medical appointment with fear. It means that learning your blood pressure, discussing cholesterol and blood sugar with a healthcare provider, taking prescribed medication consistently and reducing smoking can affect more than cardiovascular risk. These actions may also protect the blood vessels that support memory and reasoning.
Small dietary changes can contribute as well. Adding beans, vegetables, fruit, whole grains, nuts or other minimally processed foods may be more sustainable than pursuing a restrictive “perfect” diet. Drinking water instead of one sugary beverage, preparing one additional meal at home or adding fibre to a familiar meal can become meaningful when repeated.
The difficulty begins when health is presented as a test of virtue. Bodies are influenced by genetics, income, working conditions, stress, neighbourhoods and access to care. A person is not morally superior because their blood pressure is lower, nor morally responsible for every diagnosis. The goal is not perfection. It is to support the systems that support the brain whenever doing so is realistically possible.
4. Stay Connected to Other People
Social connection asks the brain to interpret language, tone, memory, facial expressions, emotion and context. A conversation may appear effortless, but it is an extraordinarily complex cognitive activity.
Social isolation is one of the modifiable factors associated with dementia risk. That does not mean that everyone needs a large social circle or a crowded schedule. Some people feel more nourished by one close relationship than by dozens of casual contacts. Quality, safety and meaning matter.
A small action could involve calling someone rather than sending another brief message, eating with another person, visiting a neighbour, joining a free community activity or creating a regular time to speak with family. Dancing can become social as well. Two people can dance together at home, follow an online routine, share songs or simply move while talking and laughing.
It is easy to assume that social connection matters only because it makes people happier. Its influence may be broader. Relationships can encourage movement, provide emotional support, notice health changes and keep a person engaged with experiences beyond their own immediate thoughts.
Loneliness is not a personal failure. People can become isolated through bereavement, disability, migration, caregiving, poverty, discrimination or the disappearance of community spaces. Addressing social isolation requires individual effort where possible, but it also requires communities that make participation easier.
5. Keep Learning Something That Requires Attention
The brain remains capable of adaptation throughout life. Learning does not prevent all neurological disease, but education and cognitively stimulating activity may contribute to cognitive reserve—the brain’s ability to tolerate or compensate for some changes before daily functioning becomes noticeably impaired.
The activity does not need to be academically impressive. A person might learn a new recipe, practise another language, read about an unfamiliar subject, use a musical instrument, repair something, write, draw, garden or learn a dance sequence. What matters is that the activity requires attention, adjustment and participation rather than passive repetition alone.
Dance belongs here as much as it belongs under exercise. Learning a sequence requires memory and concentration. Improvising requires rapid decisions. Following a rhythm involves prediction and timing. Even repeating a simple pattern can become more mentally demanding when the direction, pace or music changes.
The deeper value of learning may not be found in becoming an expert. It is found in remaining available to surprise. Curiosity asks the mind to loosen its routines and encounter something it cannot completely predict.
Where Does Sleep Fit?
Sleep is essential to attention, memory, mood and physical health. Persistent sleep problems can also be associated with conditions that affect cognition, including sleep apnea, depression and cardiovascular disease. Someone who is chronically exhausted may experience substantial memory and concentration problems even without dementia.
At the same time, sleep was not included among the final 14 modifiable risk factors in the 2024 Lancet Commission’s population estimate. Research continues to examine the complex relationship among sleep quality, abnormal proteins, vascular health and neurodegenerative disease. It would therefore be misleading to promise that sleeping a certain number of hours will prevent dementia.
A practical approach is to treat sleep problems as worthy of attention rather than as a personal weakness. Maintaining a reasonably regular routine, reducing late-night stimulation and seeking medical advice for loud snoring, breathing interruptions, severe insomnia or persistent daytime sleepiness may improve daily functioning and identify treatable conditions.
Can These Habits Treat Dementia?
Lifestyle practices can support health, function and quality of life, but they should not be presented as cures. Once dementia is present, movement, music, dance, social engagement and cognitive activities may still help some people with mood, mobility, communication or daily participation. Their value does not depend on reversing the underlying disease.
Dance programs may be particularly useful because they can combine movement with pleasure, rhythm and human connection. Someone living with cognitive impairment may not remember every sequence, but they may still respond to familiar music, mirror another person’s movements or experience enjoyment in the moment.
That matters.
Treatment is not only about changing a laboratory measurement. It is also about reducing distress, preserving ability, supporting caregivers and helping a person remain engaged with life.
Any activity for someone with dementia should be adapted to their abilities and environment. Fall risks, fatigue, pain, confusion and medication effects must be considered. A chair, stable support, familiar music and another person nearby may make dancing safer and more enjoyable. The goal is not performance. It is participation.
Prevention Is Not Control
Learning that some dementia risk may be modifiable can feel empowering, but it can also create another illusion: the belief that every outcome can be controlled through sufficient discipline.
That is not what the research shows.
Risk reduction changes probabilities. It does not provide certainty. A physically active, socially connected person may still develop dementia. Someone who faced years of illness, poverty or limited access to healthcare did not simply fail to make the right choices.
Notice what happens when prevention becomes blame. The very information intended to help people can become another way to judge them.
A more honest approach allows responsibility and uncertainty to coexist. We can care for our bodies without believing we command them. We can support our brains while recognizing that biology remains complex. We can make small changes not because they guarantee a particular future, but because they may improve the life we are living now.
Movement can improve today’s mobility and mood. A phone call can reduce today’s isolation. Hearing care can make today’s conversation easier. Learning can make today’s mind more engaged. Dancing to one song can create a moment of energy or pleasure even when no one knows what the future holds.
The Life Inside the Habit
Dementia discussions often focus on what a person might lose. Memory. Language. Independence. Identity. These fears are understandable, but they may also reveal how tightly we equate a human being with particular cognitive abilities.
Who are we when memory changes?
Does a person become less worthy when they cannot explain themselves clearly?
Is identity located only in the stories we can consciously recall, or is it also present in relationship, emotion, sensation, music and awareness?
A familiar song can sometimes reach someone when ordinary conversation cannot. A hand can still respond to another hand. A body can recognize rhythm even when a sequence of words has become difficult to follow. These moments do not erase the devastation dementia can cause, but they challenge the assumption that a person disappears the instant their cognition changes.
The small practices that support brain health are therefore about more than extending cognitive performance. They are ways of participating in life while it is here. Dancing, learning, connecting and caring for the body do not merely prepare us for an uncertain future. They create experiences in the present.
Continue the Exploration
The brain is not an isolated machine. It develops through movement, relationships, sensory experience, environment, attention and time. Caring for it invites us to look beyond fear and ask how we are relating to the life happening through us now.
If these questions resonate with you, continue the exploration in Proof That You’re God. The book examines the assumptions beneath identity, control and awareness, inviting readers to consider whether who they are can ever be reduced to a memory, a diagnosis or a story the mind tells about itself.
