More than 7 million Americans are living with Alzheimer’s today, and that number is projected to climb toward 13 million by 2050, according to the Alzheimer’s Association.
Here’s the part that doesn’t get repeated enough: You have more control over this than you think.
A major 2024 update from the Lancet Commission on dementia found that up to 45% of dementia cases worldwide are tied to 14 modifiable risk factors — things you can actually do something about. Not a cure. Not a guarantee. But real, researched odds you can shift in your favor.
I’ve spent more than 35 years reporting on things that protect people’s futures, and this is one of the rare cases where the “boring” advice — move more, sleep better, stay connected — genuinely holds up under scientific scrutiny. So let’s get into it.
1. Get moving — even a little counts
You don’t need to train for a marathon. Researchers found that walking just 3,000 to 5,000 steps a day was tied to a three-year delay in cognitive decline among people already at elevated risk.
Separate research out of Boston University found that staying physically active in midlife or later was linked to a 40% lower risk of dementia. It’s one of the single most well-supported habits on this list.
2. Feed your brain the MIND diet
Researchers at Rush University Medical Center developed the MIND diet specifically for brain health. It blends the Mediterranean and DASH (Dietary Approaches to Stop Hypertension) diets, leaning hard on leafy greens, berries, nuts, olive oil, fish and beans, while going light on red meat, butter, cheese and fried food.
You don’t have to follow it perfectly. Even partial adherence has been linked to a meaningfully lower risk of Alzheimer’s in the research behind the diet.
3. Keep your blood pressure in check
High blood pressure damages blood vessels throughout the body — including the ones feeding your brain. The National Institute on Aging lists uncontrolled blood pressure as one of the clearest, best-supported risk factors for dementia.
The fix isn’t exotic: medication if you need it, less sodium, more movement and regular checkups. Boring. Effective.
4. Manage your blood sugar
Diabetes roughly doubles your risk of developing dementia, and the connection runs through the same blood vessels blood pressure damages. Alzheimers.gov, run by the National Institute on Aging, lists blood sugar management as a top actionable step.
Healthy food choices, regular activity and routine glucose checks all pull double duty here — protecting your heart and your brain at once.
5. Protect your hearing
This one surprises people. Untreated hearing loss is one of the most consistently identified risk factors in the Lancet Commission’s dementia research, likely because it accelerates social withdrawal and forces the brain to work harder just to follow conversation.
Hearing aids aren’t cheap, but there are ways to save hundreds of dollars on the ones you need.
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6. Stay socially connected
Isolation isn’t just lonely — it’s a measurable risk factor. Alzheimer’s Association research tracking more than 39,000 people found that the least socially active older adults developed dementia an average of five years earlier than the most socially active group.
A handful of hobbies that help you live longer — dancing in particular — also show up specifically tied to lower dementia risk. Call a friend. Join a class. It counts as medicine.
7. Prioritize real sleep
Poor sleep isn’t just exhausting — it interferes with your brain’s ability to clear out waste proteins linked to Alzheimer’s. Researchers have pointed to seven hours a night, no more and no less, as the sweet spot tied to the best cognitive outcomes.
If you snore heavily or wake up gasping, get checked for sleep apnea. It’s treatable, and treating it protects your brain.
8. Challenge your brain regularly
Learning something new appears to build cognitive reserve — extra capacity your brain can lean on as it ages. The Alzheimer’s Association points to research showing people in cognitively demanding jobs or hobbies across decades face a lower risk of mild cognitive impairment later on.
Take the class. Learn the instrument. Novelty seems to matter more than difficulty.
9. Guard your heart
What’s good for your heart is good for your brain — the two systems share the same plumbing. Mayo Clinic recommends controlling blood pressure, cholesterol and blood sugar together as a package, not one at a time.
That means regular checkups, not waiting for a scary number to force the issue.
10. Skip the cigarettes, watch the alcohol
Smoking damages blood vessels throughout the body, brain included, and Alzheimers.gov lists it as a clear, modifiable risk factor. Heavy drinking carries similar risk, tied to falls, worsened chronic conditions and direct effects on memory.
Neither habit is easy to change. But of everything on this list, these two carry some of the clearest evidence behind quitting.
None of this is a guarantee — Alzheimer’s research is still evolving, and genetics plays a real role no lifestyle change can fully override. But a large share of dementia risk really does appear to be within your control. Start with one item on this list. Then add another.
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