This 1 factor increases risk of memory loss in older adults, new study shows

Respondents who were socially isolated and lonely had the greatest decline in memory. But loneliness alone, not social isolation, had the second greatest affect on memory.

While social connections are proven to keep you sharp and happy as you age, it’s just as important to stay mentally active whether or not you’re around people.

“Brains never complete their wiring,” said Dr. Lisa Feldman Barrett, psychologist and neuroscientist, during “The Science of Aging Smarter” class.

And your brain’s ability to change its neuron wiring, also called plasticity, lasts your entire life. This means you can learn new skills at any point.

One way to improve your brain plasticity is to try new things.

“Any time you encounter something you didn’t anticipate or you didn’t predict, and it’s possibly useful in the future, your brain is gonna attempt to learn it,” Barrett said. “And learning is plasticity.”

Activities like traveling, learning a new language, or reading a book can all improve your brain health.

Physical activity can also stimulate brain cell growth, Dr. Wendy Suzuki, a neuroscientist and dean of the New York University College of Arts and Science, told CNBC Make It.

“Forms of activity that require strategy will work your prefrontal cortex more,” she said.

Of course, having stimulating social connections isn’t altogether useless. In fact, meeting new people can improve your brain plasticity, as well.

“All of these things are metabolically challenging now,” Barret said. “But they’re like an investment in a healthier, stronger you.”

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