New research just ruled out the easy answer, lucky genes, leaving scientists chasing a bigger mystery about how some brains refuse to grow old.

Picture two people, both 85 years old. One struggles to remember what she ate for breakfast. The other can recall the name of her third-grade teacher, what she wore to her wedding, and the plot of a book she read last month, as clearly as someone 30 years younger. Scientists call the second woman a SuperAger, and for nearly two decades they have been trying to figure out her secret (1).

The obvious guess was genetics. Maybe SuperAgers simply won a kind of genetic lottery, born with DNA that protects them from the memory loss and Alzheimer’s disease that catches up with most people in old age. If that were true, finding a SuperAger would be as easy as running a cheek swab.

A major study published in July 2026 just knocked that idea down. And the story of what scientists found instead, including a few genuine surprises, is a genuinely hopeful one for anyone worried about losing their edge with age.

The Genetic Answer That Fell Apart

Researchers at the University of Chicago and the Translational Genomics Research Institute set out to answer a simple question: do SuperAgers carry unusually low genetic risk for Alzheimer’s disease? They studied 142 SuperAgers and 89 typical older adults, drawing blood samples and analyzing their DNA in detail. Participants were recruited from five research centers spread across the United States and Canada, from Michigan and Wisconsin to Georgia and Ontario, making it one of the broadest studies of its kind (2).

The team looked at APOE, the single gene most strongly tied to Alzheimer’s risk. They also built three separate genetic risk scores, each one combining thousands of small genetic differences known to raise or lower a person’s odds of developing the disease. Then they compared SuperAgers to the average group.

The results surprised even the researchers. There was no meaningful difference. SuperAgers could not be told apart from typical older adults based on their genes (2). To put that in perspective, picture a simple memory test: someone reads you a list of 15 unrelated words, then asks you to recall as many as you can after a short delay. The average SuperAger in the study remembered 11 of them. The average person their age in the comparison group remembered about 5, less than half as many (2). Genetically, though, the two groups looked nearly identical.

“If that were true, identifying SuperAgers might be as simple as performing genetic testing rather than the comprehensive cognitive evaluations we currently use,” said Emily Rogalski, PhD, who directs SuperAging research at the University of Chicago and who first defined the term back in 2008 (1).

The study also turned up something almost paradoxical. A small number of SuperAgers carried the very genetic red flags researchers were testing for, including two copies of the highest-risk APOE variant, yet kept memories as sharp as anyone else in the group (2). Scientists compare cases like this to a handful of well-documented people studied elsewhere in the world: individuals from families carrying genes that almost guarantee early-onset Alzheimer’s, who somehow reached old age with clear minds anyway. Figuring out what protects these outliers, people genetically flagged for decline who keep functioning like they are decades younger, has become one of the most promising leads in the field.

Researchers also checked for three rare “super-variant” genes that have made headlines in the past for protecting a handful of people worldwide from Alzheimer’s, even when the rest of their DNA all but guaranteed they would develop it. Among the 142 SuperAgers, only one carried any of these rare variants (2). That is far too few to explain a phenomenon involving hundreds of people, more evidence that no single genetic switch is behind SuperAging.

Interestingly, this isn’t the whole story. A separate, larger study published earlier in 2026, tracking more than 18,000 older adults, found that SuperAgers were somewhat less likely to carry the riskiest version of the APOE gene and somewhat more likely to carry a protective version (7). So there may be a small genetic tilt in their favor. But a small tilt is not the same as a guarantee, and it is nowhere near strong enough to explain why one 85-year-old remembers everything and another does not.

One limitation is worth noting. The group studied was highly educated, with an average of nearly 17 years of schooling, and about three-quarters of the SuperAgers were women. Researchers say future studies need to test whether the findings hold up across more varied backgrounds (2). Still, the core conclusion stands: something else, beyond the genes we can currently measure, has to be going on.

What’s Really Different Inside Their Brains

If genes are not the full answer, the brain itself might be. And here the research gets exciting.

For more than 25 years, Northwestern University has studied SuperAgers by giving them memory tests, scanning their brains while they are alive, and, with their permission, examining their brains after they pass away. Nearly 300 people have taken part, and scientists have studied 77 donated brains so far (3).

One striking finding is speed of aging. Most people’s brains slowly shrink over the decades, especially in areas tied to memory. SuperAgers’ brains barely shrink at all. In some cases, a region involved in motivation and emotion is actually thicker than in people decades younger (3).

Scientists have also identified two different paths that lead to SuperAging. Some SuperAgers simply do not build up the sticky proteins, called plaques and tangles, that are the hallmark of Alzheimer’s disease. Researchers call this resistance. Others do build up those same proteins, just like everyone else their age, but the damage never seems to touch their memory. Researchers call that resilience (3).

The newest and perhaps most exciting clue involves brand-new brain cells. A 2026 study published in the journal Nature, led by scientists at the University of Illinois Chicago working with Northwestern and the University of Washington, found that SuperAgers’ brains keep producing new neurons, the tiny cells that carry memories and thoughts, at a rate two to two and a half times higher than their peers (5)(6). For a long time, scientists debated whether adult human brains could grow new cells at all. This study suggests that in SuperAgers, that growth never really slows down.

“What’s exciting for the public is that this study shows the aging brain is not fixed or doomed to decline,” said Ahmed Disouky, the study’s first author (6).

The Habits That Keep Showing Up

Biology alone does not seem to explain everything either. Decades of interviews and observations of SuperAgers have turned up a pattern in how they live, even if no single habit guarantees the result.

The trait that shows up again and again is strong social connection. SuperAgers tend to stay closely involved with friends and family well into their 80s and 90s, and researchers have found this social engagement linked to their unusually strong memories (3)(9). Staying mentally busy, whether through conversation, reading, learning, or continued work, also appears often in their stories.

Exercise and diet, oddly, show up less consistently. Some SuperAgers are strict about what they eat and how often they work out. Others are not, and still keep their sharp memories. This tells researchers that no single lifestyle checklist can manufacture a SuperAger, though staying active and eating well remain good advice for brain health in general (11).

Why This Matters for Everyone Else

None of this means memory loss is simply a matter of bad luck or good luck. It means the picture is more complicated, and more interesting, than a single gene or a single habit. Even people carrying high genetic risk are turning up in these studies with youthful memories intact, exactly the kind of case that could point scientists toward new treatments.

“Understanding the biological, behavioral, and social factors that promote exceptional cognitive aging may ultimately complement traditional disease-focused approaches and help inform more personalized strategies for supporting brain health across the lifespan,” said Ana Capuano, PhD, one of the study’s co-authors (1).

Researchers are now widening the search. Future studies plan to combine memory testing with brain scans, blood tests, sleep tracking, and detailed looks at how SuperAgers live day to day, hoping to piece together the fuller picture that genetics alone could not provide (2).

For now, the takeaway is a hopeful one. Memory loss is common with age, but it is not automatic. Somewhere between the genes we’re born with, the way our brain cells regenerate, and the way we choose to live, some people are finding a way to keep their minds young. Scientists have not cracked the full code yet. But every study, including the outliers who defy their own DNA, gets them a little closer.