How can I lower my dementia risk?
Nearly half of dementia risk is modifiable. Treating hearing loss, high blood pressure, smoking, physical inactivity, depression, social isolation, and diabetes across midlife makes the largest difference.
The Lancet Commission (2024) identifies 14 modifiable risk factors that together account for around 45% of dementia cases: less education, hearing loss, high blood pressure (hypertension), smoking, obesity, depression, physical inactivity, diabetes, excessive alcohol, traumatic brain injury, air pollution, social isolation, untreated vision loss, and elevated LDL cholesterol. Addressing them — especially from midlife — meaningfully lowers risk. There is no single prevention pill; there is a durable pattern: care for your ears, your blood pressure, your movement, your sleep, and your relationships.
Hearing aid use in adults with hearing loss reduces cognitive decline (ACHIEVE, 2023).
Based on 3 sources — see references
What the studies found›
High blood pressure in midlife is one of the strongest risks you can change; keeping it controlled lowers dementia rates (the SPRINT-MIND trial).
People eating the MIND or Mediterranean way tend to hold onto their thinking skills longer.
Moving regularly cuts the chance of developing dementia by roughly 20–30%.
What does the research say?
Overall strength of the research behind this answer: Strong Human Research. The detail lives in the sections below — jump straight to the part you need.
Background: what it is and why it matters›
Dementia is a gradual decline in thinking and memory big enough to get in the way of daily life; Alzheimer's disease is the most common cause.
About 55 million people live with dementia worldwide; the number is expected to triple by 2050.
Prevention now saves more years than any current treatment can add.
Persian Perspective›
Persian hakims viewed the aging brain as needing warmth, oil, gentle food, and constant conversation.
Where tradition and science agree
- Persian tradition and modern neurology agree that the brain is protected by rhythm, community, and moderation across a lifetime.
Where tradition and science differ›
- Modern medicine can quantify each risk factor and screen for early change.
How to use this information›
- Check hearing after 55 and treat loss.
- Keep blood pressure under ~130/80 with your doctor's guidance.
- Move most days; add strength twice weekly.
- Eat MIND-style: leafy greens, berries, nuts, olive oil, fish, whole grains.
- Stay socially engaged — loneliness is a real risk factor.
One small step today: Call someone you have not spoken to in a while. Social connection is brain medicine.
You cannot guarantee a healthy brain, but you can tilt the odds — with the same habits that build a good life: movement, food, sleep, love, learning.
FAQs›
Is dementia genetic?
Only a small fraction is strongly genetic. Most risk is environmental and behavioral.
Do brain games work?
They modestly improve the trained task; overall risk reduction is small compared to lifestyle.
When should I start?
Midlife (40–65) is when most modifiable risks matter most — but it is never too late.
Safety
If a symptom is new, severe, or persistent — or you are pregnant, on medication, or managing a chronic condition — please speak with a qualified clinician who knows you. Read Safety First.
Full references (3)
- Livingston G et al. — Lancet Commission on dementia (Lancet, 2024)
- SPRINT-MIND Investigators (JAMA, 2019)
- Lin FR et al. — ACHIEVE trial (Lancet, 2023)
Where evidence is uncertain, we say so. Trust grows through honesty.
About this article
- Evidence confidence
- Strong evidence
- Originally published
- July 6, 2026
- Last editorial review
- July 6, 2026
- Last scientific review
- July 6, 2026
- Next scheduled review
- July 6, 2027
- Purpose
- Educational only. Not medical advice.
- Governance
- How we review · Report a correction
Version history
- July 6, 2026Published in the Hakim Cornerstone Library.
- July 6, 2026Editorial review completed — clarity, structure, and internal links refreshed.
- July 6, 2026Scientific review completed — evidence and safety guidance verified.