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4 Things That Increase Your Risk Of Early Onset Dementia (That You Can Change)
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By 2050, researchers expect 115 million people will be living with dementia around the world. In the U.S., the CDC expects to see the sharpest increases in cases among Black and Latino 1Americans. And while dementia risk increases with age, youth doesn't always offer protection. Young onset dementia (YOD), or dementia that appears before age 65, currently affects at least 3.9 million people 2around the world.
The good news? Researchers think genetic factors explain only 5-10% of YOD cases. Lifestyle factors make up much more of the equation, which is to say, there are things we can do now to help lower your risk of developing dementia later on.
A study published in the Journal of the American Medical Association3 examined over 500,000 participants to identify risk factors tied to young onset dementia. Here's what they found.
4 things increasing your risk of early dementia
Researchers used data from the UK biobank, an ongoing prospective cohort study, but limited their investigation to participants who were under 65 and free of dementia at the start.
They followed up with each participant when they turned 65 to see if they had developed dementia and ran a statistical analysis to look for relationships between lifestyle factors and whether they got dementia.
Four modifiable lifestyle factors emerged that were associated with a higher risk of YOD:
Social isolation
We've long reported on how central social connection is to good health (and conversely, the health risks associated with loneliness) so it's no surprise to see social isolation pop up in this study. Researchers found that seeing family and friends more than once a month was protective against early dementia. On the other hand, those who socialized once a month or less were at an increased risk of early dementia.
+ What to do:
- 9 ways to make friends as an adult
- 4 ways to strengthen your relationships daily
Severe vitamin D deficiency
Participants with severe vitamin D deficiency (defined as a blood level less than 10 ng/mL) had a higher risk of YOD. This makes sense given previous research that linked those same levels to a 50% higher risk of dementia (that is, general dementia as opposed to young onset dementia).
The good news? Previous research shows that older adults who took vitamin D supplements had a 40% lower dementia incidence rate. And getting enough vitamin D pays off in other ways too.
As endocrinologist Brittany Henderson, M.D., previously told mindbodygreen, "[30 ng/mL] is the bare minimum level to avoid major issues known to occur with vitamin D deficiency, including bone issues and poor thyroid health...Higher levels of serum 25(OH)D have consistently been associated with improvements in mood, enhancement of the immune system, and more."
+ What to do:
Grip strength
Researchers looked for a relationship between physical frailty and dementia by measuring hand grip strength, a well-known predictor of cognitive decline. Those who had above-average grip strength had a lower risk of YOD than those with lower levels of grip strength. Luckily, there are plenty of ways to strengthen the grip, from opening jars to doing kettlebell swings.
+What to do:
Alcohol use
Here's where things got a bit less straightforward. Participants with a diagnosed alcohol use disorder had a higher risk of YOD. But when it came to more moderate levels of alcohol use, drinkers appeared to fare better than those who abstained. Researchers noted the moderate and even heavy drinking was associated with a lower risk of YOD compared to those who drank no alcohol.
That said, other research has linked alcohol to an increased risk of dementia, not to mention other diseases, so it's probably not wise to take these findings as carte blanche to drink excessively. When you do drink, we recommend sticking to low-sugar options and doing so earlier in the day to minimize the impact on your sleep.
+What to do:
- The 8 healthiest alcohols, according to R.D.s
- 5 ways to make drinking easier on your body
It's worth noting that researchers also found less modifiable risk factors that increased the likelihood of developing YOD in this study, such as diabetes, stroke, heart disease, and depression. Adopting these four habits may be even more important and beneficial for people who have any of these preexisting conditions.
The takeaway
Dementia is on the rise, but there are things we can do to prevent it. The research identified modifiable risk factors (read: habits we can change) associated with dementia that occurs before age 65.
By socializing more than once a month, maintaining healthy vitamin D levels, working on our grip strength, and being mindful about alcohol consumption, we can boost our chances of having more dementia-free years.
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