The 80-year-olds outsmarting their 50-year-old selves

By Amy Schroeder

I’ve been planning to become a Cool Old Lady since I was a teenager. That’s why I’m excited to hear about this study from the University of Illinois Chicago (my hometown). Researchers found that “SuperAgers” — people 80+ with the memory of someone 20-30 years younger — are still making new neurons in the hippocampus, and their brains look molecularly distinct from both typical aging brains and Alzheimer’s brains.

The behaviors linked to this resilience (curiosity, learning, real engagement) aren’t new advice — but now there’s a biological mechanism to explain why they might matter.

Using donated brain tissue, researchers led by Drs. Orly Lazarov and Jalees Rehmanthe analyzed more than 350,000 individual cells from the hippocampus, the brain’s memory and learning hub, looking for what makes SuperAger brains different at the cellular level.

What they found upends a long-standing assumption: adult brains can still make new neurons, and how much they make appears to track directly with cognitive health. SuperAgers had a distinct molecular signature tied to new neuron formation, and more newly created neurons than any other group studied — including other healthy older adults. People with Alzheimer’s disease, by contrast, showed clear signs that neuron creation had broken down. SuperAger brains also better preserved the cellular processes that keep neurons talking to each other and staying alive.

In other words, exceptional memory in old age isn’t just about which neurons survive. It’s about which brains keep making new ones.

That finding lines up with something health writers have been circling for a while: brain aging isn’t a single script everyone follows on the same timeline. It’s a slow negotiation, playing out unevenly across different regions and different people, shaped by decades of small choices long before anyone notices a forgotten name or a misplaced set of keys.

The behavioral pattern researchers keep seeing in SuperAgers isn’t higher IQ or elite education. It’s engagement — staying curious, learning new things, maintaining real relationships, taking on problems that require actual effort. Neuroscientists have long suspected this kind of challenge helps the brain stay adaptable. Now there’s a biological mechanism that helps explain why: sustained engagement may be part of what keeps the hippocampus generating new neurons well into old age, rather than letting that process quietly shut down.

This also reframes when brain health actually starts. Alzheimer’s and related dementias don’t begin the day someone forgets an appointment — the underlying changes, including disruptions to neuron creation, appear to build for years beforehand. Waiting for memory problems to show up before caring about brain health is a bit like waiting for chest pain before caring about your heart.

None of this means everyone can become a SuperAger through sheer effort — genetics and disease still matter. But it does mean the story of your brain at 80 is, in real measure, being written by what you’re asking of it today. Novelty, learning, and real engagement aren’t just feel-good advice. They may be biological signals telling your hippocampus whether it’s still needed.

Thanks to Lisa Shissler Smith, Founder of Daisy Triangle home automations in North Carolina, for sharing this card with The Midst Mastermind group last week. I haven’t found the deck yet, but I found a shirt here.

Stay tuned: Next week I’m excited to introduce you to all of the members of The Midst Mastermind Cohort 1.

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At 47, Anissa Buckley’s life came apart all at once. Both of her parents died. Her 12-year marriage ended. She exited her second company. And then she did something most of us would never think to do in the middle of so much grief.

She sold or stored nearly everything she owned, packed a backpack, and flew to South Africa.

“It was the beginning of learning about something called Hormetic Resilience,” she says now — the idea that strategic, appropriate doses of stress don’t just help us survive hardship. They make us stronger than we were before. Stronger, perhaps, than we ever imagined we could be.

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We’ll announce more speakers soon! Contact me at amy@the-midst.com.