This week, the World Health Organization released its first major update to dementia prevention guidelines in seven years – and it both solidifies and challenges what we knew about preventing cognitive decline.
Up to 45% of dementia cases could be prevented or delayed by addressing modifiable risk factors. The updated guidelines identify proven interventions including healthy diet (leafy greens, berries, nuts, olive oil), regular physical activity, and meaningful cognitive stimulation.
As ADNeT Chief Investigator Professor Kaarin Anstey, the only Australian researcher involved in the creation of the new guidelines, explained to RACGP’s newsGP: ” Evidence on health behaviours relating to exercise, healthy diet and cognitive activity is now strong enough to make recommendations about these to patients.”
On cognitive engagement specifically, she notes: “It’s not just doing the same crossword every day. It’s things that actually challenge your brain.”
Learning languages, taking courses, reading, and playing challenging games all count.
Hearing aids, social engagement, and reducing air pollution exposure also received strong endorsement. Other recommendations include managing hypertension, diabetes, and high cholesterol, plus dietary restriction for adults who are overweight or obese.
The WHO guidelines also confirm that vitamin supplements and menopausal hormone therapy show no meaningful benefit for dementia prevention, despite popular belief.
As Dr Stephanie Daly, Chair of RACGP Specific Interests Dementia, notes: ” There’s a lot of people in the private market wanting to influence people as to what they should be doing to look after their health,” making it important for GPs to understand this evidence.
There’s also a new shift in the conversation fundamentally, of approaching dementia prevention beyond a personal responsibility. Individual lifestyle choices alone won’t reduce dementia prevalence. Professor Anstey is emphatic on this:
” Dementia risk reduction is clearly complex and involves many aspects of health over the life course. This requires a whole of society approach. We need to ensure people can afford access to GPs to help manage risk factors, but also have access to affordable healthy food, opportunities to exercise, and have clean air, hearing aids and social activities.“
Dr Daly also calls for better funding: “You can’t do this work in a short consult… We need to have better funded, longer consults in order to do this because these are complex conversations that require detailed engagement.”
Why this matters for Australia: Dementia is our leading cause of death, affecting approximately 446, 500 Australians.
We now have evidence-based prevention strategies, but real progress requires systemic investment in healthcare infrastructure, affordable nutrition programs, exercise facilities, clean air policy, and community programs – not just individual responsibility.
Find out more:
RACGP
The Age
ABC Radio
7 News
Dementia Guidelines