WHO Releases Updated Guidelines Saying Up to 45% of Dementia Risk Could Be Prevented or Delayed

Jul 15, 2026

The World Health Organization released updated guidelines on July 15, 2026, revealing that up to 45% of dementia risk could be prevented or delayed by addressing modifiable factors like tobacco use, air pollution, and hypertension. Dementia currently affects over 57 million people globally and costs the world economy $1.3 trillion annually, with half of that cost falling on unpaid caregivers. WHO Director-General Tedros Adhanom Ghebreyesus said countries now have clear, evidence-based recommendations that can be put into practice immediately.

WHO dementia prevention guidelines update

▪The World Health Organization released updated global guidelines on July 15, 2026, aimed at reducing the risk of cognitive decline and dementia.
▪The World Health Organization's updated guidelines reflect scientific advances and evidence accumulated since the agency first issued dementia risk reduction recommendations in 2019.

Modifiable dementia risk factors

▪Modifiable risk factors linked to dementia include tobacco use, harmful alcohol consumption, physical inactivity, air pollution, social isolation, and noncommunicable diseases.
▪Up to 45% of dementia risk may be preventable or delayed by addressing modifiable risk factors throughout life.

Global dementia prevalence statistics

▪More than 57 million people worldwide are living with dementia, with nearly 10 million new cases diagnosed each year.
▪Alzheimer's disease is the most common form of dementia, accounting for an estimated 60 to 70 percent of all cases.

Economic burden of dementia

▪Approximately half of the global economic burden of dementia stems from unpaid care provided by family members and friends.
▪Dementia costs the global economy an estimated $1.3 trillion annually.

Evidence-based prevention recommendations

▪The World Health Organization recommends cognitive training, cognitive stimulation, and social engagement for adults with normal cognition or mild cognitive impairment.
▪The World Health Organization recommends regular physical activity, stopping tobacco use, reducing alcohol consumption, eating a healthy diet, and reducing exposure to air pollution to lower dementia risk.
▪The World Health Organization advises against taking vitamin B, vitamin E, omega-3 fatty acids, or multivitamins solely to prevent dementia unless a deficiency has been diagnosed.