In plain English
The lifestyle choices you make affect cognitive trajectory, mood and quality of life, whether you have dementia or are trying to prevent it. The 2024 Lancet Commission identified 14 modifiable risk factors that together account for around 40 per cent of dementia cases worldwide. This section shows how to act on them.
The case for lifestyle
For most people, lifestyle is the single most powerful lever for cognitive health. The Lancet Commission on dementia prevention (2024 update) identified 14 modifiable risk factors: Hypertension, hearing loss, smoking, obesity, depression, physical inactivity, diabetes, excessive alcohol, traumatic brain injury, air pollution, social isolation, less education, low LDL cholesterol management, and visual impairment. Acting on these together meaningfully changes risk and trajectory.
The core pages
- Vascular risk reduction: the most evidence-backed action area. Blood pressure, lipids, glucose, smoking, alcohol.
- Exercise: 150 minutes of moderate activity per week, plus two strength sessions.
- Diet and nutrition: Mediterranean and MIND eating patterns.
- Brain training: what works, what does not.
- Social engagement: loneliness as a measurable risk factor.
- Sleep: insomnia, Sleep Apnoea, sleep hygiene.
Individual vascular levers
Practical living-well topics
- The value of routine and structure
- Promoting independence safely
- Hearing aids, glasses and cognition
- Vitamin D, B12 and folate
- Travelling with a dementia diagnosis
A realistic weekly plan
If you do nothing else this year, do these:
- 30 minutes of brisk walking most days;
- Two short resistance sessions per week;
- Mediterranean-style eating, with oily fish twice a week, beans and vegetables daily;
- Blood pressure to target, with home monitoring;
- HbA1c and lipid profile reviewed every 12 months;
- Alcohol within UK guidelines (under 14 units/week);
- Hearing aids worn if needed;
- Two regular social commitments each week;
- 7 to 8 hours of consistent sleep, treating any Sleep Apnoea.
The cumulative effect of these steps over five to ten years is meaningful. The 2024 Lancet Commission estimates that addressing the 14 risk factors fully would prevent or delay 40 per cent of dementia cases.
For people with a diagnosis
The same lifestyle measures slow progression and improve quality of life. Vascular risk reduction is especially important in Mixed Alzheimer's and Vascular Dementia and Vascular Dementia. Combined with medication where appropriate and structured Cognitive Stimulation Therapy, lifestyle interventions are the best-evidenced approach available.
Frequently asked questions
Can lifestyle really prevent dementia?
The 2024 Lancet Commission estimates that addressing 14 modifiable risk factors fully would prevent or delay around 40 per cent of dementia cases worldwide. No single change is decisive, but the cumulative effect is substantial.
Is it too late to start once I have a diagnosis?
No. Lifestyle measures slow progression, improve mood, reduce falls, and benefit cardiovascular health at any stage. Starting now still matters.
What is the most important single thing?
Vascular risk reduction (blood pressure, lipids, glucose, smoking, alcohol). It has the largest evidence base and benefits both prevention and progression.
Are supplements worth taking?
Only to correct confirmed deficiencies (Vitamin B12, folate, Vitamin D). Routine multivitamins and 'brain support' supplements have not been shown to prevent dementia.
Do I need to give up alcohol entirely?
No, unless you are drinking heavily. UK guidelines (under 14 units/week, several alcohol-free days) are a reasonable target. Less is generally better for cognition.
References
- Livingston G et al. Dementia prevention, intervention and care: 2024 report of the Lancet standing Commission.
- UK Chief Medical Officers. Physical activity guidelines 2019.
- NICE NG7: Behaviour change: individual approaches.
- World Health Organization. Risk reduction of cognitive decline and dementia. 2019.
