New WHO Guidelines: Up to 45% of Dementia Risk Could Be Prevented or Delayed

The World Health Organization (WHO) has officially released its updated guidelines on reducing the risk of cognitive decline and dementia. The new document provides countries with a set of evidence-based recommendations designed to help prevent or delay the onset of dementia across a patient's life course.

Dementia is a progressive condition caused by various underlying brain diseases that impair memory, thinking, and general functional abilities. According to WHO data, more than 57 million people currently live with dementia worldwide, with nearly 10 million new cases diagnosed every year. Alzheimer's disease remains the most common form, accounting for an estimated 60% to 70% of all cases.

### Easing the Global Economic and Social Burden Beyond the personal health impact, dementia leads to a loss of independence, dignity, and safety for affected individuals. It also carries a massive economic cost, draining an estimated $1.3 trillion from the global economy annually. Nearly half of this economic burden comes from unpaid care provided by family members and friends.

"We know more today than ever before about what drives dementia risk, and these guidelines translate that knowledge into action," said Dr. Tedros Adhanom Ghebreyesus, WHO Director-General. "Countries now have clear, evidence-based recommendations they can put into practice immediately to protect people's cognitive health."

### Modifiable Risk Factors: The Key to Prevention While there is currently no cure for dementia, the WHO highlights that up to 45% of cases can be linked to modifiable risk factors. By addressing these factors through public health policy and individual lifestyle changes, societies can prevent or delay a significant portion of cognitive decline.

The updated guidelines recommend several healthy behaviors and interventions: 1. **Behavioral Changes:** Engaging in regular physical activity, stopping tobacco use, reducing alcohol consumption, and adopting a healthy diet. 2. **Social and Cognitive Stimulation:** Engaging in social activities and participating in cognitive training or stimulation, especially for adults experiencing mild cognitive impairment. 3. **Environmental Exposure:** A new recommendation advising reducing long-term exposure to air pollution. 4. **Medical Conditions:** Actively managing cardiometabolic conditions such as high blood pressure, diabetes, and high cholesterol. 5. **Sensory Support:** Offering hearing aids to older adults as part of a comprehensive risk-reduction strategy.

### Interventions Not Recommended Crucially, the WHO guidelines advise against taking vitamin B, vitamin E, omega-3 fatty acids, or multivitamin/mineral supplements as a way to reduce dementia risk, unless a patient has a diagnosed medical deficiency. The guidelines cite a lack of scientific evidence showing any cognitive benefit, warning that unexpected side effects can sometimes occur.