Three findings from the last few months that made me stop in my tracks, and that should change how you think about your brain, career, and life. Except this time it’s four because I care about you that much. :)

In this issue:

• A shingles vaccine appears to protect against dementia, which is forcing scientists to reconsider whether Alzheimer’s is partly a viral disease

• An analysis of 34,000 world-class performers just buried the 10,000-hour rule: the best kids almost never become the best adults

• AI now beats the average human on creativity tests, but the top 10% of humans still aren’t close to being matched

• A 60-year scientific debate was settled in July: your brain can grow new neurons well into old age (!)

1. A Shingles Shot and the Dementia Question Nobody Expected

The shingles vaccine was designed to prevent a painful rash. What researchers found is also considerably more interesting. A study published in Nature in April 2025, led by Stanford Medicine’s Pascal Geldsetzer, exploited a natural experiment in Wales in which vaccine eligibility was determined by the exact date of birth, creating two groups identical in every measurable way except for vaccination status. People who received the vaccine were 20% less likely to develop dementia over seven years, a signal that has since been replicated across England, Australia, New Zealand, and Canada. A follow-up published in Cell in December 2025 found that among people already living with dementia, the vaccinated were nearly 30% less likely to die from the disease over nine years, suggesting the vaccine slows progression, not just onset.

The mechanism remains under active investigation, and a randomized controlled trial has not yet been run. The working hypothesis is that the varicella-zoster virus, which causes shingles, can reactivate silently in the nervous system and promote the neuroinflammation characteristic of Alzheimer’s. That would mean dementia is partly a viral process, which would reframe decades of research strategy.

What does it mean for you?

If you are 50 or older and have not had the recombinant shingles vaccine (Shingrix in the US), this is a high-priority conversation with your doctor, independent of any concern about shingles itself. If you have a parent in their 60s or 70s who has not been vaccinated, this is a specific, sourceable reason to raise it now. Two doses, spaced two to six months apart. For me, I am going to avoid as many viral infections as possible, not just shingles!

2. The Best Kids Almost Never Become the Best Adults

A December 2025 review in Science, led by Arne Güllich and analyzing 34,000 world-class performers across Olympic athletics, Nobel Prize science, classical music, and elite chess, found three patterns consistent enough across all fields that the authors call universal. The best young performers and the best adult performers are mostly different people. Those who eventually reached world-class status were not early standouts; their development was gradual and often unremarkable by youth standards. And peak adult performers did not specialize narrowly in childhood: world-class athletes averaged two additional sports in adolescence, and Nobel laureates were significantly more likely than national-award peers to have pursued serious avocations outside their primary field.

Roughly 90% (not 100%, meaning I am sure there’s an exception you know of, so don’t come for me) of the highest-ranked youth performers in any domain are not among those who dominate at the adult peak. The findings displace the 10,000-hour rule not by questioning the value of practice, but by showing that the type of early experience that predicts world-class adult performance is broad rather than concentrated.

What does it mean for you?

If you are managing or mentoring someone early in their development, resist the pressure to specialize narrowly before they have explored broadly. Two or three parallel disciplines, even unrelated ones, improve the odds of finding the right fit and develop the transferable learning capacity that sustains long-term performance.

For your own career: if you have suppressed interests outside your core domain out of professional discipline, the evidence is now on the side of pursuing them.

For your sake, maybe don’t share it with your parents, lest they start pushing new prodigy dreams on you in adulthood!

3. AI Now Beats the Average Human at Creativity

A January 2026 study in Scientific Reports, co-authored by AI pioneer Yoshua Bengio and comparing modern large language models to more than 100,000 human participants, used the Divergent Association Task, a validated measure of creative thinking that asks people to generate 10 words with maximum semantic distance from each other. GPT-4 scored above the median human. The most creative half of human participants scored higher than all tested AI models. The top 10% performed at a level no AI could match.

The task measures one dimension of creativity: linguistic divergent thinking. It does not capture embodied experience, narrative construction under constraint, or visual composition. But on idea generation at scale, the median human is now being outperformed, and the implication is less about replacement than distribution. Average creative output is being commoditized; value is concentrating among people operating at the upper end.

What does it mean for you?

Assess your creative role within the overall distribution. If your contributions are mainly generating viable ideas or variations on familiar frameworks, others are now matching that. The goal isn't to avoid AI tools but to use them as collaborators while focusing on tasks needing a human touch: unexpected cross-domain synthesis, deep contextual judgment, and originality seen in top scorers connecting ideas across fields. Focus your energy on the top 10% of innovations that matter.

4. Your Brain Grows New Neurons at 78

For sixty years, the neuroscience consensus held that adult human brains do not generate new neurons. In July 2025, a team at the Karolinska Institute, publishing in Science, settled the debate. Using single-nucleus RNA sequencing and machine learning on hippocampal tissue from 35 people aged from birth to 78, the researchers identified neural progenitor cells (cells that divide to create new neurons) in adult brains across the full age range. Multiple senior neuroscientists not involved in the work have said the debate is now over. (I still remember this was being freshly discovered, and the functions of the newly born neurons were being pondered. It was like a floodgate opening for new possibilities for adult brains!)

The rate is low: previous work estimated about 700 new neurons daily in the hippocampus, less than 0.03% of the total, with significant individual variatiom including some adults showing no neurogenesis. It's unclear if genetic, lifestyle, or measurement factors cause this. The fatalist view that brain aging is an irreversible loss from a fixed endowment is incorrect. The significance of the low rate is unclear to me, as the functions and integration of these new neurons are not fully understood.

What does it mean for you?

Behaviors that boost hippocampal neurogenesis in animals and correspond with human cognitive aging research include aerobic exercise, regular sleep, calorie moderation, and new learning. Aerobic exercise has the strongest evidence, with three or more weekly sessions linked to significant neurogenic benefits in animals. If you haven't reached this level, knowing your hippocampus can still change structurally into old age provides motivation to start, beyond just general health advice.

1. Exercise Doesn’t Just Strengthen Your Body. It Physically Repairs Your Brain.

A study published in Cell by UCSF researchers identified the exact mechanism by which exercise protects memory: physical activity prompts the liver to release an enzyme called GPLD1 that travels to the blood-brain barrier and removes a harmful protein called TNAP, which accumulates with age and allows the inflammation driving Alzheimer’s pathology to enter the brain. When researchers reduced TNAP levels in mice to those of 70-year-old humans, the barrier tightened, inflammation decreased, and memory performance improved.

Takeaway: For professionals in high-cognitive-demand careers, regular aerobic exercise is not a lifestyle amenity but a direct investment in the organ that runs every decision, meeting, and creative output your work depends on, and this research finally explains the molecular reason why.

2. Your Shingles Vaccine May Be Slowing Your Biological Clock

A study from USC’s Leonard Davis School of Gerontology published in the Journals of Gerontology analyzed more than 3,800 Americans over 70 and found that those who received the shingles vaccine showed significantly slower biological aging, lower chronic inflammation, and better epigenetic aging scores compared to unvaccinated adults, with the benefits persisting four or more years post-vaccination. The researchers believe the vaccine suppresses the latent reactivation of the varicella-zoster virus, which, even when dormant, appears to sustain the low-grade immune activation known as “inflammaging” that accelerates age-related disease across organ systems.

Takeaway: If you or a parent over 50 has not received the Shingrix vaccine, this study provides a compelling reason beyond pain prevention to get it soon: the evidence is building that it is a meaningful factor in how the body ages at the cellular level.

3. Worrying About Getting Older May Actually Make You Age Faster

A study from the NYU School of Global Public Health, published in Psychoneuroendocrinology, used epigenetic clocks to analyze data from 726 women and found that those most anxious about future health decline showed measurably faster biological aging in their blood, while worries about appearance or fertility showed no comparable effect. When researchers controlled for unhealthy coping behaviors like smoking and alcohol, the direct statistical link weakened, suggesting that what anxious people do with their fear matters as much as the fear itself.

Takeaway: The science increasingly points toward psychological state as a measurable variable in physical aging, which means actively working on how you relate to growing older, whether through therapy, mindset practices, or reframing aging with curiosity rather than dread, is not soft self-help but a biologically grounded strategy.

4. The Air You’ve Been Breathing for Decades Is a Direct Risk Factor for Alzheimer’s

A landmark study from Emory University published in PLOS Medicine tracked 27.8 million U.S. Medicare beneficiaries over nearly two decades and found that more than 95% of the pollution-to-Alzheimer’s risk runs through direct neurological pathways rather than intermediary conditions like hypertension or stroke, meaning that managing those conditions alone will not eliminate the brain risk from breathing dirty air. The association held broadly across the population, with people who had a prior history of stroke facing compounded vulnerability.

Takeaway: Checking local air quality indexes before exercising outdoors, using HEPA filtration at home and in the office, and supporting strong environmental health policy are now demonstrably brain health decisions, not just respiratory ones.

5. Scientists Just Reprogrammed Brain Cells to Clear Alzheimer’s Plaques With a Single Injection

Researchers at Washington University School of Medicine published findings in Science describing a CAR-astrocyte therapy that genetically equips the brain’s most abundant support cells to identify and engulf amyloid-beta plaques, with a single injection preventing plaque formation entirely in young mice and reducing existing plaques by half in mice that had already developed them. The approach is years from human trials but represents a meaningful conceptual shift toward harnessing the brain’s own cellular machinery rather than relying on repeated external infusions.

Takeaway: For anyone with a family history of Alzheimer’s, the most actionable steps today remain the lifestyle variables, exercise, sleep quality, clean air, and managed inflammation, that current evidence consistently identifies as the strongest tools for shifting disease trajectory before symptoms appear, while research like this builds toward the next generation of treatment.

6. AI Is Amplifying Workloads but Fragmenting the Attention Required to Handle Them

ActivTrak’s 2026 State of the Workplace report, drawing on behavioral data from more than 163,000 employees, found that while AI adoption reached 80% and productive hours rose 5%, focus efficiency fell to a three-year low of 60% and disengagement risk rose 23%, suggesting AI is multiplying work volume faster than it is freeing up the sustained attention that high-stakes thinking requires. DHR Global’s Workforce Trends Report adds that employee engagement collapsed from 88% to 64% in a single year, with early-career employees bearing the sharpest impact.

Takeaway: For leaders, the implication is that adding AI tools or shortening workdays alone will not reverse these numbers; the evidence points to protected time for focused work, transparent decision-making, and consistent development conversations as the levers that determine whether people bring their full cognitive capacity to their work.

7. Burnout Has Reached 83% of Knowledge Workers, and the Youngest Are Hardest Hit

DHR Global’s 2026 Workforce Trends Report, surveying 1,500 corporate professionals across three regions, found that 83% of knowledge workers report at least some burnout, with lack of recognition nearly doubling as a driver from 17% to 32% in a single year, and 62% of associates reporting burnout-driven disengagement compared to just 38% of C-suite leaders. What connects this to neuroscience is mechanism: the WHO estimates burnout costs $322 billion annually in lost productivity, and the cognitive systems it most degrades, working memory, executive function, and emotional regulation, are exactly the ones professional performance depends on most.

Takeaway: The most evidence-backed organizational response is structural rather than programmatic: realistic workloads, transparent decision-making processes, and consistent recognition, because these are the three levers that research from Gallup, DHR, and organizational neuroscience converges on as the actual drivers of whether people bring their full cognitive capacity to work.

I am trying out something new.

In addition to the monthly life question neuroscience deep dives, I am adding a monthly science news round-up newsletter. In this newsletter, I will share with you real, peer-reviewed articles and news that have tangible applicability and offer my takeaways for everyday life. Many will focus on the brain, some will explore healthspan, and all will be interesting.

Without further ado, below is the first edition. Please share your thoughts and suggestions in the comments below.

Some linked articles are paywalled (I am also in favor of the free dissemination of science news, but alas, we aren’t there yet).

1. Put down the salt because it’s inflaming your brain

   The high-salt diet activated immune cells (reactive microglia) surrounding vasopressin-secreting neurons (vasopressin is a “stress hormone” that is also vital in maintaining water balance and blood pressure), causing inflammation and a surge in the hormone vasopressin, which in turn raises blood pressure.

   Why is this interesting? This finding introduces a specific brain region as a new target for hypertension drugs, not just your kidneys and heart. And, importantly, while not the focus of this study, any evidence of inflammation in the brain is enough for me to take action, given its impact on cognitive decline. Good-bye, salty foods!

2. Do later eating times foreshadow your demise?

   
   Scientists at MGH found that “as people aged, they tended to eat breakfast and dinner later, and those with more health problems or a genetic tendency to stay up late also tended to eat later.” Eating later isn’t causing the age-related health issues; instead, the health issues (see figure; challenges in eating prep, etc.) tend to be reflected in the shifting eating times.

   Takeaway: Next time your aging parents want to eat early in the morning and show up to that early bird special, take it as a good sign that they are still healthy. And if you find your meal times shifting later, take a moment to reset and consider whether your overall health needs a check-up. Also, I learned a new word: Chrononutrition, the study of the timing of eating.

   

3. How was this not a bigger news? The first drug for age-related farsightedness has been approved!

   
   LENZ Therapeutics, Inc., announced the FDA approved VIZZ (aceclidine ophthalmic solution) 1.44%, the first and only FDA-approved aceclidine-based eye drop for the treatment of presbyopia in adults. VIZZ is a once-daily eye drop developed to restore clear near vision for up to 10 hours. Although 128 million Americans live with blurry near-vision, this groundbreaking news has not garnered the attention it deserves.

   
   Why should you care? Yes, aging is a gift, but it seems that we have come to accept physical decline as inevitable, even when they are detrimental to the quality of life. As more of us are living longer, we should be supporting the development of drugs that improve our everyday experience, especially ones that can change the course or outcome of our nervous system degeneration. I would also love to see drugs that can improve bowel movement, bladder control, reverse hearing loss, and restore olfaction. These aren’t sexy drugs, but we gotta move past the “at least you are alive” mentality.
   

   

4. Turns out your brain really likes money
   
   Researchers discovered that two brain areas, the right insula, a deep brain region associated with feelings of fatigue, and the dorsal lateral prefrontal cortex, areas located on both sides of the brain that regulate working memory, exhibited higher activity and connectivity during cognitive fatigue. Importantly, they found that the financial incentives need to be high for participants to exert increased cognitive effort, suggesting that external incentives prompt such effort.
   
   Put simply, with enough financial motivation, we're willing to push past the fatigue. This makes sense. And when we hear another billionaire say, “Just push through it, it’s tough work,” we know it’s easier to motivate when the motivation is a significant financial reward. That being said, you can apply this insight to pursue meaningful goals, take bolder risks with potential big payoffs, and envision a fulfilling outcome to drive yourself through tough times. That is probably what motivates entrepreneurs to go at it!
   
   That’s the wrap for the latest headlines in science you can apply to your life! See you in the deep dive.