The World Health Organization (WHO) released a major update to its guidelines on reducing the risk of cognitive decline and dementia. The second edition of the original 2019 report incorporates the latest scientific evidence and adds seven new health conditions and exposures to the existing list of risk factors.
New risk factors added
The WHO now includes the following additional factors: hearing loss, traumatic brain injury, air pollution, vision impairment, sleep problems, untreated HIV infection, and exposure to certain toxins such as lead, mercury, and excessive alcohol. These join the previously identified 12 factors, which cover cardiovascular disease, diabetes, smoking, low education, physical inactivity, depression, social isolation, and others.
Expert commentary
Dr. Daniel Amen, founder of the Amen Clinics, discussed the updates with Fox News Digital. He highlighted that many of the new items—especially head trauma, sleep disturbances, and environmental toxins—have long been recognized by clinicians as contributors to brain health. “If we protect the brain early, we protect the whole person later,” Dr. Amen said.
He also noted that the WHO does not recommend menopausal hormone therapy specifically to prevent dementia in women over 65, and that evidence is insufficient for younger women. While hormonal changes during menopause can affect mood and memory, the link to dementia remains uncertain.
Why lifestyle matters
The updated guidelines echo a growing consensus that dementia prevention is a lifelong effort. “We should be on a dementia prevention program our whole lives,” Dr. Amen emphasized. He urged readers to consider the following practical steps:
- Protect the brain from injury – wear helmets during sports and avoid risky activities that could cause concussion.
- Maintain good cardiovascular health – manage blood pressure, cholesterol, and diabetes.
- Limit exposure to pollutants – reduce indoor and outdoor air pollution, avoid lead‑containing products, and drink responsibly.
- Address sleep problems – aim for at least seven hours of quality sleep; treat sleep apnea when present.
- Stay socially and mentally active – engage in learning new skills, maintain social connections, and keep the mind challenged.
Research suggests that adequate sleep supports the brain’s waste‑clearance processes, helping to remove beta‑amyloid, a protein linked to Alzheimer’s disease. Likewise, untreated HIV infection can damage the central nervous system, underscoring the importance of early testing and treatment.
Implications for families
For families with older relatives, the WHO’s guidance offers a roadmap to reduce the likelihood of dementia. Parents can model healthy habits, encourage regular medical check‑ups, and create environments that limit exposure to harmful substances.
While the evidence for some new factors—such as vision impairment and certain toxins—is still considered low to very low certainty, the WHO recommends precautionary measures. Reducing fine particulate matter in the air, for example, may lower the risk of cognitive decline.
Looking ahead
The WHO’s updated guidelines reinforce the message that dementia prevention is not a short‑term project but a lifelong commitment. By integrating these recommendations into daily routines, individuals can help safeguard their brain health well into their senior years.
Original reporting: Fox News (HLL/CB) — read the source article.
