Shocking Study Links These 15 Factors to Early Dementia
It’s a chilling thought.
Most of us think of dementia as something that happens in our 70s or 80s. But young-onset dementia (YOD)—dementia diagnosed before age 65—is impacting hundreds of thousands of people each year.
And now, for the first time, scientists believe they’ve found why.
A massive new study, published in JAMA Neurology, analyzed data from over 356,000 adults under 65 in the UK.
The goal? To uncover what puts people at risk for dementia decades earlier than expected.
The results?
Groundbreaking.
While most prior studies focused solely on genetics, this new research identifies 15 lifestyle and health factors linked to YOD—many of them modifiable.
In other words, you can take action.
“This is the largest and most robust study of its kind ever conducted,” said epidemiologist David Llewellyn from the University of Exeter. “It reveals that we may be able to take action to reduce risk… through targeting a range of different factors.”
Here are the key takeaways…
The study found several risk factors that may increase your likelihood of developing young-onset dementia, including:
- Low socioeconomic status
- Social isolation
- Hearing impairment
- Stroke
- Diabetes
- Heart disease
- Depression
- Vitamin D deficiency
- High levels of C-reactive protein (a marker of inflammation)
- Genetic variants (two copies of ApoE4 ε4)
Each of these—especially when combined—appears to increase your chances of developing dementia before age 65.
Researchers also explored alcohol’s effect—and it’s complicated. Alcohol abuse was clearly linked to higher dementia risk. But surprisingly, moderate to heavy drinking was associated with lower risk.
Why? The researchers believe it may be due to overall health: People who abstain entirely often do so for medical reasons, which may skew the data. In short: don’t take this as a reason to drink more—but rather a reason to evaluate your overall health habits.
The study also found several protective factors—habits or conditions associated with a lower risk of YOD. These included:
- Higher levels of formal education
- Stronger grip strength (a sign of better physical health and lower frailty)
These findings align with previous research on dementia in older adults: Keeping your mind sharp, staying physically strong, and remaining socially connected may all help delay or prevent cognitive decline.
As neuroepidemiologist Sebastian Köhler from Maastricht University put it: “Mental health also plays an important role, including avoiding chronic stress, loneliness, and depression.”
If someone you know is in their 40s, 50s, or early 60s and experiencing changes in memory or cognition, don’t assume it’s “too early” for dementia. And more importantly—don’t assume nothing can be done.
While some risk factors like genetics can’t be changed, this study shows that many can. Small lifestyle changes now may dramatically reduce your risk down the line.
Because dementia isn’t just about aging. It’s about how we age—and how we care for our minds and bodies along the way.
To preventing all forms of dementia,
Rachel Mace
Managing Editorial Director, e-Alert
with contributions from the research team
