The World Health Organization (WHO) has released updated guidelines aimed at reducing the risk of cognitive decline and dementia through evidence-based recommendations. These guidelines are designed to assist countries in implementing strategies that could prevent or delay dementia onset throughout a person’s life.
Dementia, a condition resulting from brain diseases, affects memory, thinking, and daily functioning. Currently, over 57 million people worldwide live with dementia, and nearly 10 million new cases are diagnosed annually. Alzheimer’s disease is the most prevalent form, responsible for 60–70% of dementia cases.
Modifiable Risk Factors
While a cure for dementia remains elusive, WHO suggests that up to 45% of dementia risks are linked to modifiable factors such as tobacco and alcohol use, social isolation, physical inactivity, air pollution, and noncommunicable diseases (NCDs) like hypertension and diabetes. Dementia not only impacts health but also affects personal independence and safety.
Dr. Tedros Adhanom Ghebreyesus, WHO Director-General, stated, “We know more today than ever before about what drives dementia risk, and these guidelines translate that knowledge into action.” He emphasized that countries can now implement these clear, evidence-based recommendations to promote cognitive health.
Updated Recommendations
The new guidelines incorporate the latest scientific findings and innovations in dementia risk reduction, offering proven interventions for early awareness and timely measures. This development presents a significant opportunity to alleviate the dementia burden by integrating services for NCDs, mental health, and brain health.
The guidelines advocate for several healthy behaviors and lifestyle changes to lower dementia risk, including:
- Cognitive training and engagement in social activities for individuals with normal cognition or mild cognitive impairment.
- Increased physical activity.
- Quitting tobacco use and reducing alcohol consumption.
- Adopting a healthy diet.
- Reducing exposure to air pollution.
Managing conditions such as hypertension, diabetes, and high cholesterol can also mitigate dementia risk. Hearing aids may be considered part of a strategy to reduce cognitive decline risks.
The guidelines advise against using supplements like vitamins B and E, omega-3 polyunsaturated fatty acids (PUFA), and multivitamins/minerals in the absence of diagnosed deficiencies, as there is no substantial evidence supporting their benefits over potential harms.
Economic and Human Impact
Dementia has a profound impact on individuals’ ability to live independently, work, and perform daily functions. It places significant stress on families and caregivers, with a global economic cost estimated at US$ 1.3 trillion annually. Approximately half of this cost is attributed to unpaid care by family and friends. By understanding risk factors and taking preventive action, individuals can enhance their health and quality of life, promoting longer, healthier, and more independent living.
Note: Always consult a healthcare professional for personalized medical advice and before implementing any health-related changes.