Few health diagnoses create as much fear as dementia.
For many older adults, the worry is not simply about forgetting a name or misplacing the keys. It is about losing independence, struggling with everyday decisions, or eventually needing someone else to manage the life you spent decades building.
That fear can make dementia seem inevitable.
But science has been painting a more complicated picture.
In July 2026, the World Health Organization released the second edition of its guidelines on reducing the risk of cognitive decline and dementia. The updated guidance reflects growing evidence that dementia risk is influenced by factors across the life course—including cardiovascular health, physical activity, smoking, hearing, vision, social connection and environmental exposures.
One figure has attracted particular attention: up to 45% of dementia risk may be attributable to 14 modifiable risk factors.
That is an encouraging message—but it needs to be understood correctly.
It does not mean that 45% of dementia cases can definitely be prevented in every person. Genetics, age and diseases of the brain still matter enormously.
What it does mean is that dementia risk is not entirely outside our control.
And for older adults, that can be a meaningful distinction.
Dementia Is Not a Normal Part of Aging
Getting older does not automatically mean developing dementia.
The risk does increase substantially with age, but dementia is caused by diseases that damage the brain rather than by aging itself. Alzheimer’s disease is the most common cause, but several other brain diseases can also produce dementia.
This matters because some of the factors that affect brain health are also familiar contributors to heart disease and stroke.
In other words, what protects your blood vessels may also help protect your brain.
Start With the Numbers You Can Measure
For older adults, one of the most practical places to begin is cardiovascular health.
High blood pressure, high blood sugar and unhealthy cholesterol levels are all associated with increased dementia risk. Over many years, problems affecting the blood vessels can contribute to damage in the brain.
That makes routine medical care more important than it might appear.
A blood-pressure check is not merely about your heart.
A cholesterol test is not merely about your arteries.
A diabetes check is not merely about your blood sugar.
These numbers can also tell part of the story about your long-term brain health.
The goal is not to chase perfect numbers on your own. Instead, discuss your results with your healthcare professional and make sure conditions such as hypertension, diabetes and high cholesterol are appropriately managed.
Hearing Loss Deserves More Attention
There is another risk factor that older adults often underestimate: hearing loss.
You may notice it gradually.
The television gets a little louder. Restaurants become harder to follow. Family members seem to mumble. You start asking people to repeat themselves.
It can be tempting to think, “That’s just what happens when you get older.”
But hearing health deserves attention.
The new WHO guidance includes hearing aids among interventions that may form part of dementia risk-reduction strategies.
That does not mean hearing aids are guaranteed to prevent dementia.
Rather, treating hearing loss can help address an important, potentially modifiable contributor to cognitive health while also making everyday communication easier.
If conversations have become noticeably harder to follow, a hearing evaluation may be worth discussing with a healthcare professional.
Your Eyes Matter, Too
Vision is another piece of the puzzle.
The WHO identifies vision loss among factors associated with dementia risk, alongside hearing loss and several cardiovascular and lifestyle factors.
For an older person, better vision can affect far more than reading a newspaper.
It can influence mobility, confidence, social participation and the ability to remain independent.
That makes regular eye care useful not because it guarantees protection against dementia, but because maintaining sensory health supports quality of life and may address one potentially modifiable risk factor.
Movement Still Matters
You do not need to become an athlete to take brain health seriously.
Physical inactivity is one of the modifiable factors identified in current dementia-risk guidance. WHO recommends physical activity as part of a broader approach to reducing cognitive decline and dementia risk.
For an older adult, that might mean finding forms of movement that are realistic and enjoyable—walking, swimming, gardening, dancing or other activities suited to your abilities and health.
The important point is consistency, not perfection.
If you have been inactive for a long time or have medical conditions that affect exercise, it is sensible to ask your healthcare professional what level of activity is appropriate for you.
Don’t Forget the Social Side of Brain Health
Brain health is not only about blood tests and exercise.
Social isolation and loneliness have also become important parts of the dementia conversation.
The relationship is complicated, and social activity should not be presented as a guaranteed dementia-prevention treatment. WHO emphasizes social participation and support as important to health and well-being, while also noting that evidence for social activity specifically preventing dementia remains limited.
Still, there is a very human reason to take connection seriously.
Conversation, friendship, volunteering, community activities and time with family can give everyday life structure, stimulation and meaning.
Those things matter at any age.
What About “Brain-Boosting” Supplements?
This is where the new guidance offers a useful reality check.
The WHO does not recommend vitamin B or E supplements, omega-3 fatty acids or multivitamin/mineral supplements specifically to reduce dementia risk when there is no diagnosed deficiency.
That is important in a market filled with products promising sharper memory and a younger brain.
There is no magic capsule that replaces good medical care.
If you have a genuine nutritional deficiency, supplementation may be appropriate—but that is different from taking supplements simply because they are advertised as dementia protection.
The Bigger Picture
The most encouraging message from the latest research may be that brain health is not a single switch.
It is influenced by many pieces of our health over many years.
Some begin earlier in life. Others remain relevant in midlife and older age.
For someone already in their 60s, 70s or beyond, that does not mean the opportunity has passed.
It means the focus can shift toward the things that still make sense today: keeping blood pressure, blood sugar and cholesterol under appropriate control; staying physically active; looking after hearing and vision; avoiding tobacco; eating a balanced diet; limiting harmful alcohol use; staying mentally and socially engaged; and reducing exposure to air pollution where practical.
None of these steps guarantees that a person will avoid dementia.
But together, they represent something much more realistic than a promise of perfect prevention.
They represent risk reduction.
And perhaps that is the most useful way to think about the new WHO message.
You cannot choose your age.
You cannot rewrite your genes.
You cannot control every disease that affects the brain.
But there are still parts of your health that you can discuss, monitor and improve.
For an older adult worried about dementia, that is not a small thing.
It is a reason to stay engaged with your health—and to remember that getting older does not mean giving up on the health of your brain.
Photo by Yaroslav Shuraev: https://www.pexels.com/photo/man-getting-a-head-massage-8088603/