For almost twenty years, researchers studying SuperAgers, the rare adults who reach their 80s and 90s with the memory of someone decades younger, have had a nagging, simpler explanation sitting in the background. What if these people just won a genetic lottery, inheriting unusually little risk for Alzheimer’s disease in the first place? If true, finding a future SuperAger wouldn’t require years of cognitive testing. It would just take a blood draw.
A new study out of the University of Chicago’s Healthy Aging and Alzheimer’s Research Care Center, working with the Translational Genomics Research Institute, part of City of Hope, went and actually checked.
142 SuperAgers, Three Genetic Scores, No Difference
Researchers compared 142 SuperAgers against 89 cognitively average older adults, all recruited from five sites across the United States and Canada. Using DNA pulled from blood samples, the team examined APOE, the single strongest known genetic risk factor for Alzheimer’s, along with three separate polygenic risk scores, each one tallying thousands of genetic variants tied to inherited disease risk.
None of it told the two groups apart. Not APOE status, not any of the three polygenic scores. Published in Alzheimer’s Research & Therapy, the finding closes off the tidy explanation that’s hovered over SuperAger research since the field began. Study co-author Ungerleider put it directly: current Alzheimer’s genetic risk scores cannot predict who will become a SuperAger. Emily Rogalski, who defined the SuperAger category back in 2008 and co-led this newest work, has been candid about what was actually at stake in the result. Had genetics explained it, identifying a SuperAger really could have been reduced to a simple test rather than the extensive memory evaluation her team still relies on.
There’s a genuinely practical piece hiding inside a null result here. A family hoping a clean genetic panel might reassure them about a parent’s or their own memory prospects won’t find that reassurance in this kind of testing, the actual clinical implication researchers pointed to directly. A favorable result doesn’t guarantee exceptional memory. An unfavorable one doesn’t rule it out either.
So What Does Explain It
Genetics being ruled out doesn’t leave researchers empty-handed, and this is where the story turns hopeful rather than just negative. A separate study earlier this year out of Northwestern and the University of Illinois Chicago found that SuperAger brains generate at least twice as many new neurons in the hippocampus, the brain’s memory center, compared with typically aging peers. Researcher Changiz Geula described SuperAgers as carrying more immature neurons and neuroblasts, a sign of stronger neurogenesis than the researchers found in either typical aging or Alzheimer’s brains, alongside changes in support cells called astrocytes that appear to nurture those young neurons the way rich soil supports a sapling.
Outside the genetics and the neuron counts sits something more within an individual’s actual control. Richard Isaacson, an Alzheimer’s prevention researcher not involved in this study, pointed to lifestyle factors with real evidence behind them: diet, exercise, stress reduction, better sleep, and managing vascular risk with the right medications have all been shown to grow hippocampal volume and reduce the buildup of tau and amyloid, the same proteins tied to Alzheimer’s decline. None of that is a genetic advantage. It’s daily behavior, sustained over years, and it’s the kind of protective territory already showing up in separate research on why some brains resist Alzheimer’s pathology even when the disease is technically present.
Researchers say the next phase of work will pull together cognitive testing, brain imaging, blood biomarkers, immune profiling, sleep tracking, and social measures, treating SuperAging as something built from many small, interacting pieces rather than one dominant cause. That’s a harder story to summarize than “good genes,” but it’s also a considerably more useful one for anyone still deciding how to spend the next twenty years of their own life, a message that lines up with broader prevention findings showing memory decline is a lot less inevitable than most people assume.
