A new study suggests that older adults who stay active with digital technology may have a lower risk of developing dementia. The research, based on a large data review, shows that using smartphones, browsing the internet, and staying connected through email and social media can help keep the brain sharp in later life.

Researchers from two Texas universities examined over 400,000 older adults and found that regular tech use was linked to a 42% lower chance of cognitive decline. Their findings were published in Nature Human Behavior.

How Technology Helps the Aging Brain

As more seniors enter the digital world, experts want to understand how this affects brain health. For years, some believed that too much screen time might harm memory. This idea is known as the “digital dementia hypothesis.”

But the new study found the opposite.

Dr. Jared Benge, a co-author from the University of Texas at Austin, said, “The data show a clear link between digital activity and better mental function. This held true even after we accounted for factors like education and income.”

The researchers looked at 57 studies involving 411,430 people. On average, participants were 68 years old when the studies began. The research covered tech habits such as texting, using search engines, and video chatting.

No Evidence That Tech Harms Brain Function

None of the studies in the review found that using technology made memory worse. This came as a surprise to many. Dr. Michael Scullin, another co-author from Baylor University, said, “It’s rare to see this kind of agreement across so many studies.”

Dr. Christopher Anderson, a brain health expert in Boston who was not involved in the study, called the results “impressive and reassuring.” He praised the study’s depth and long-term view.

Even though the data look strong, the study did not examine how much screen time is ideal. It also did not say which types of digital activities are best for brain health.

Keep It Balanced: Not All Screen Time Is Equal

Experts say that how people use technology matters. Simply watching videos for hours may not help the brain much. But using devices to learn, connect with others, or play challenging games can be very helpful.

Dr. Benge explained, “This doesn’t mean we should all be glued to screens. It shows that digital tools can be part of a healthy lifestyle when used in smart ways.”

Dr. Amit Sachdev from Michigan State University, who was not involved in the study, added, “The key is to use technology with purpose—whether to learn something, talk with loved ones, or solve problems.”

Tech Can Build Brain Strength

This research supports a popular idea in brain science: the cognitive reserve theory. It says that people who challenge their brains regularly may delay memory loss. Digital activities may help build this “reserve” by keeping the brain active and flexible.

Messaging, email, and video calls also help older people stay in touch with family and friends. That social connection can reduce loneliness, which is another risk factor for dementia.

Dr. Anderson noted that many older adults are not “digital natives,” so learning to use technology in old age may itself be a brain workout. “Even struggling to learn a new app can help,” he said.

Tips for Healthy Tech Use Later in Life

Doctors recommend seniors use devices in ways that challenge the brain or create connections. Good digital habits might include:

• Learning something new online
• Playing puzzle or logic games
• Talking with family through video chat
• Writing emails or messages
• Reading the news or books online

Dr. Sachdev shared a simple rule: “Have a clear reason for using your device. Avoid mindless scrolling. If it hurts your eyes or neck, take a break.”

Even Early Dementia Doesn’t Block Tech Learning

One key finding was that even people showing early signs of dementia can still learn new digital skills. While it may take more time, the process of learning helps brain function.

Dr. Scullin said, “It’s not too late to learn. In fact, the effort may be part of what helps the brain stay healthy.”

As life expectancy rises and more seniors stay connected, this research points to a hopeful future. With the right tools and habits, digital life may offer strong support for brain health.