There's a sweet spot for us older folks regarding prevention of dementia and use of social media according to an 8-year study of over 18,000 dementia-free 50 to 65 year olds followed 8 years. It's probably the same for mental health, as some social media can be supportive.
Lots of caveats about this study, the biggest being the well-known association between educational and occupational attainment and both prevalence and incidence of dementia in studies around the world.
>>People who used the internet at the start of the study had about half the risk of dementia as people who were not regular users.
The researchers also looked at how often these adults were online, from not at all to more than eight hours a day. Those who used the internet for about two hours or less a day had the lowest risk of dementia compared with those that didn't use the internet, who had a "notably higher estimated risk."
The researchers noted that people who were online six to eight hours a day had a higher risk of dementia, but that finding wasn't statistically significant, they said, and more research is needed.
Online engagement may help to develop and maintain cognitive reserve, which can in turn compensate for brain aging and reduce the risk of dementia," said Chang, an associate professor of global public health at New York University's School of Global Public Health.
The study also did not look at what people were exploring online. Although the internet is full of
cat videos and
conspiracy theories, it can also be intellectually stimulating, and some studies have shown that intellectual stimulation may help prevent dementia. A
2020 study found an association between cognitively stimulating jobs and a lower risk of dementia, for example.<<