Plain English with Derek Thompson — "BEST OF: The Healthiest ‘Super-Agers’ Have One Thing in Common, According to a 25-Year Study"

Date: January 20, 2026
Guest: Dr. Sandra Weintraub, Professor of Psychiatry and Behavioral Sciences, Northwestern University

Episode Overview

This "best of" episode re-airs one of Derek Thompson's favorite interviews, diving into the fascinating science of "super-agers"—people in their 80s whose memory performs like someone in their 50s. Derek interviews Dr. Sandra Weintraub, a leader in the study of memory, aging, and dementia. Together, they unpack a groundbreaking 25-year study revealing that the clearest commonality among super-agers is not diet, exercise, or medication, but the depth of their social relationships. The conversation explores the brain’s anatomy, definitions of dementia, and larger implications for public health and healthy aging.

Key Discussion Points & Insights

1. Dr. Weintraub's Path to the Field

(06:38–13:23)

• Early interest at McGill: Dr. Weintraub was fascinated by how the brain drives behavior, but found few clinical career paths besides neurology or neurosurgery. Neuropsychology—focusing on brain injury and its impacts—became her calling.
• Progression to aging: Working with aging patients, she saw first-hand the variability in memory function among older adults. Some faced severe dementia, while others remained sharp—sparking her interest in what enables remarkable memory preservation.

“...I saw people who were incredible that had memories like a 20 year old. And I got really interested in what is...why do those people, how can they preserve their memory?”
—Dr. Sandra Weintraub (09:35)

2. Clarifying Key Terms: Aphasia, Dementia, and Normal Aging

(10:00–13:23)

• Aphasia: Defined as the loss of language function, usually from stroke or neurodegeneration.
• Normal memory loss vs. dementia: Cognitive decline is on a spectrum; some forgetfulness is normal, but dementia impairs daily life.
• The concept of "normal aging" is misleading—older adults’ cognitive abilities span a wide range, with some elderly performing as well as much younger people on memory tests.

“If you take 1,000 people between 65 and 85 ... the standard deviation is huge. So it means that there are people at the top ... that are performing like 30 year olds.”
—Dr. Sandra Weintraub (11:24)

3. What Is a Super-Ager?

(12:44–16:11)

• Not about longevity: A super-ager is not just someone who lives longer, but someone 80+ with unusually robust memory.
• Historic study on physicians: Their memory outperformed peers, but weren’t different in health habits—other than being more likely to still be working.
• Takeaway: Super-aging is rare, not explained by obvious factors like diet or medication.

“We wanted, you know, we're focusing so much on this average and ... Let's see what's keeping these guys at the top up there.”
—Dr. Sandra Weintraub (15:17)

4. How Memory Changes (and Doesn’t) With Age

(16:11–19:36)

• Memory decline is gradual, not sudden.
• Distribution of ability gets much wider with age—individual trajectories vary dramatically.
• Responsibilities and complexity of adult life can exacerbate perceived memory "loss" even before measurable decline.

“If there's one message I want to get across ... do not assume that age equals loss of cognitive ability. Just don't assume it. It's so individual.”
—Dr. Sandra Weintraub (16:57)

5. Physical Brain Changes and Mystery of Alzheimer’s

(18:54–23:30)

• Super-agers’ brains shrink less over time than normal agers, but the difference isn’t dramatic.
• Even super-agers may have significant Alzheimer's pathology (plaques/tangles) but show no memory loss—reasons unknown.
• Alzheimer’s is overdiagnosed; only some cognitive decline is due to this specific disease.

“There are several ways. And one of them is you don't make the plaques and tangles ... The second is you make them, but you're immune to them.”
—Dr. Sandra Weintraub (20:41)

6. Defining and Studying Super-Agers

(24:02–25:40)

• Strict operational definition: 80+ years old, recall ≥9 of 15 words after 20 minutes in a memory test.
• Not defined by health, habits, or social class.
• Cautions against loose uses of the label in media; study focuses on truly exceptional memory performance.

“There's no such a thing as a biological superager that came out of the Garden of Eden. We said, here's what a superager is...”
—Dr. Sandra Weintraub (24:23)

7. The Big Finding: Social Connection Above All

(28:23–33:19)

• Study found no unifying diet, medication, disease history, or exercise pattern among super-agers.
• Key shared trait: Deep, rich, gregarious social connections.
• Anatomically, super-agers have a thicker anterior cingulate gyrus—linked to social cognition and containing “von Economo neurons,” found in highly social species (humans, elephants, whales, bonobos).

“We looked at different areas of the brain and we found that there's one particular structure called the anterior cingulate gyrus ... that was actually larger in superagers than in normal agers and even in 55 year olds.”
—Dr. Sandra Weintraub (28:36)

• Speculation: Maybe social connection itself maintains brain structure critical for memory; or perhaps those with stronger brains are able to maintain richer social lives.

“One possibility is that people who are genetically predisposed to have healthier parts of the brain socialize more and also have better memory. But ... maybe ... it's social connection itself that helps maintain cortical thickness.”
—Derek Thompson (05:42)

8. Social Fitness and Brain Health: Wider Science

(33:19–36:14)

• Derek cites the Harvard Study of Adult Development, which likewise found social relationships as the key predictor of happiness and longevity.
• Social stimulation (even in rats) increases brain thickness, suggesting a physical benefit to socializing.

“If rats are raised in cages by themselves versus rats raised in cages with other rats ... their cortex in the brain, it's thicker in the socializing rats than in the non socializing rats.”
—Dr. Sandra Weintraub (32:13)

• Possible evolutionary link: memory evolved to serve social needs—remembering people, status, histories crucial for survival.

“Maybe one reason why social connection protects memory is because at some mechanistic level, at some evolutionary level, memory is for socializing.”
—Derek Thompson (33:48)

9. Public Health Implications

(36:14–38:55)

• Broad lifestyle advice: what’s good for your heart is good for your brain.
• But there’s no one-size prescription; genetics, personality, early life, and social context all matter.
• Growing social isolation could threaten cognitive health as a societal issue.

“Basically what you want to do is do anything you can to reduce your particular risk ... We always say that what's good for your heart is good for your brain.”
—Dr. Sandra Weintraub (37:28)

10. Measuring Social Connection

(38:55–40:16)

• Super-agers scored higher on measures of extroversion and psychological well-being, specifically in domains of social connection.
• Personality surveys, not just counts of friends or time spent socializing, show this strong tendency toward connection.

“On the personality measures they had more extroversion than normal agers. And ... the one thing that stood out for them was the importance of social connections.”
—Dr. Sandra Weintraub (39:59)

11. Future Research: Beyond Memory

(40:16–42:18)

• Need more super-ager subjects; incidence is rare.
• Interested in exploring if super-agers have other areas of exceptional cognitive performance, not just memory.
• Also examining other kinds of memory, like name recall during spontaneous speech.

“So now we want to kind of find out, do these people not only have super memory, but might they have something else super?”
—Dr. Sandra Weintraub (40:46)

Notable Quotes (with Timestamps)

• On defining old age memory:
  “Do not assume that age equals loss of cognitive ability. Just don't assume it. It's so individual.”
  —Dr. Sandra Weintraub (16:57)

• On social traits and brain anatomy:
  “...the anterior cingulate region is the part of the brain critical for, among other things, socializing... Just as doing bicep curls strengthens your arms as you get old. Deep socializing...strengthens the part of our brains that are responsible for memory retention as we age.”
  —Derek Thompson (05:55)

• On the importance of relationships:
  “That social positive approach to life was in both, what made both groups successful for those who were successful.”
  —Dr. Sandra Weintraub (32:07) (on the Harvard Study)

• On broadening public health advice:
  “What's good for your heart is good for your brain. So whatever you do to keep your heart health, you also want to keep your brain health.”
  —Dr. Sandra Weintraub (37:27)

Memorable Moments & Tone

• Derek poking fun at his own memory lapses and claiming, “I have a biomedical excuse that I can give to my wife” (17:42), keeping the tone relatable and light.
• Dr. Weintraub’s candor about unknowns in Alzheimer’s research and her insistence on nuance: “We always get asked, do I have Alzheimer's or dementia?... Biologically, we don't know until we do your biomarkers or we look at the brain.” (23:05)
• Playful scientific banter about not wanting to perform invasive animal studies on brain regions associated with socializing (31:01-31:05).

Episode Structure & Timestamps

• [01:54] – Derek’s intro and episode framing
• [06:35] – Dr. Weintraub’s background
• [10:00] – Explanation of terms: aphasia, dementia, cognitive impairment
• [12:44] – Concept and study of super-agers
• [16:11] – Data on aging, decline, and cognitive diversity
• [19:36] – The physical shrinking of the aging brain
• [23:30] – Dissecting the most recent super-ager study
• [28:23] – The central role of social connection
• [33:19] – Connecting findings to broader happiness research
• [36:14] – Implications for public health messaging
• [38:55] – Measuring social connection in practice
• [40:16] – What’s next in super-ager research
• [42:18] – Episode conclusion

Summary Takeaway

The “super-ager” phenomenon challenges assumptions about inevitable cognitive decline with age, showing that, while genetics and other factors matter, the biggest unifying trait among those who retain youthful memory into their 80s is the depth and quality of their social connections. As society ages and socializing declines, these findings may hold profound public health significance—pointing to the brain as a fundamentally social organ nourished by relationships as much as by diet, exercise, and luck.