
Restore Youthfulness & Vitality to the Aging Brain & Body | Dr. Tony Wyss-Coray
Dr. Tony Wyss-Coray (guest), Andrew Huberman (host)
In this episode of Huberman Lab, featuring Dr. Tony Wyss-Coray and Andrew Huberman, Restore Youthfulness & Vitality to the Aging Brain & Body | Dr. Tony Wyss-Coray explores how young-blood factors, exercise signals, and biomarkers reshape aging science Dr. Tony Wyss-Coray explains research showing that circulating factors in young blood (and in exercised animals’ blood) can improve brain function in older mice, including reduced inflammation, stem-cell reactivation, and better memory.
How young-blood factors, exercise signals, and biomarkers reshape aging science
Dr. Tony Wyss-Coray explains research showing that circulating factors in young blood (and in exercised animals’ blood) can improve brain function in older mice, including reduced inflammation, stem-cell reactivation, and better memory.
The conversation emphasizes that aging is heterogeneous: organs (and even cell types) age at different rates, and “age gaps” measured from blood proteins can predict future disease risk in specific organs.
They review early human translation efforts (plasma fractions, therapeutic plasma exchange, small Alzheimer’s/Parkinson’s trials) while repeatedly stressing the need for large, blinded clinical trials and caution against unproven “rejuvenation” clinics.
Lifestyle pillars—exercise, sleep, light exposure, nutrition/fasting, and social connection—are discussed through the lens of measurable blood/CSF factors and the goal of extending healthspan rather than merely lifespan.
Key Takeaways
Young systemic factors can measurably rejuvenate aged brain function in animals.
In parabiosis and related infusion studies, exposure of old mice to young circulation reduced neuroinflammation, reactivated brain stem-cell activity, increased neural activity measures, and improved memory performance.
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Rejuvenation is not just adding “good” factors—removing “bad” ones matters too.
Wyss-Coray describes age-related rises in inflammatory proteins; in mice, neutralizing certain detrimental factors can improve cognition, suggesting therapies may require both supplementation and inhibition.
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Aging is organ-specific; an “age gap” in one organ predicts disease risk in that organ.
Using large-scale blood proteomics, proteins originating from specific organs can estimate organ age; deviations from chronological age (“age gap”) strongly predict future disease (e. ...
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The field is shifting from “one aging clock” to multi-organ and even cell-type aging readouts.
Wyss-Coray previews work assigning plasma proteins to ~40 cell types to estimate cell-type ages; in ALS, “older” skeletal/heart muscle cell signatures predicted future disease risk years before diagnosis.
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Human evidence for plasma-based rejuvenation is intriguing but not definitive yet.
Small Alzheimer’s/Parkinson’s infusion studies and a larger Grifols study (therapeutic plasma exchange plus albumin) reported benefits, but the next step is large, blinded, placebo-controlled trials for clear efficacy and approval.
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Exercise benefits can be transferrable via blood—and may differ by exercise type.
Blood from exercised mice improved brain outcomes in recipient mice; one highlighted mechanism involves liver-released factors (e. ...
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CSF composition changes with age and strongly tracks cognitive resilience via synaptic proteins.
In thousands of CSF samples, the strongest cognition-linked proteins were synaptic; a ratio of two top markers predicted resilience/decline independent of classic Alzheimer’s pathology markers, implying synaptic health is central to cognitive aging.
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Be highly cautious with unregulated “rejuvenation” interventions, especially stem-cell injections.
Both discuss severe real-world complications (e. ...
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Notable Quotes
“For the first time, we could take an old brain, and we could give factors from a young organism and ask, ‘Is that going to change the age of the brain?’ And that’s indeed what it did.”
— Dr. Tony Wyss-Coray
“It’s all of the above.”
— Dr. Tony Wyss-Coray
“There is no human intervention that can extend lifespan that has been tested or validated.”
— Dr. Tony Wyss-Coray
“The worst is probably for the body to eat all the time… a lot of people snack the whole day.”
— Dr. Tony Wyss-Coray
“Alcohol itself is probably not good for our body… but a lot of drinks are part of a social environment.”
— Dr. Tony Wyss-Coray
Questions Answered in This Episode
In the parabiosis and plasma-infusion work, what specific evidence best separates “adding youthful factors” from “diluting/removing harmful aged factors” as the main driver of cognitive improvements?
Dr. ...
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Which plasma fractions tested with Grifols appeared most effective in mice, and what is the strongest mechanistic clue for why those fractions worked?
The conversation emphasizes that aging is heterogeneous: organs (and even cell types) age at different rates, and “age gaps” measured from blood proteins can predict future disease risk in specific organs.
Get the full analysis with uListen AI
What would a decisive, FDA-grade clinical trial for plasma exchange or plasma fractions in early Alzheimer’s look like (endpoints, duration, patient selection, biomarkers)?
They review early human translation efforts (plasma fractions, therapeutic plasma exchange, small Alzheimer’s/Parkinson’s trials) while repeatedly stressing the need for large, blinded clinical trials and caution against unproven “rejuvenation” clinics.
Get the full analysis with uListen AI
How robust are protein-based organ-age estimates across different labs/platforms (e.g., Olink vs SomaScan), and how sensitive are they to acute factors like infection, sleep loss, or recent hard exercise?
Lifestyle pillars—exercise, sleep, light exposure, nutrition/fasting, and social connection—are discussed through the lens of measurable blood/CSF factors and the goal of extending healthspan rather than merely lifespan.
Get the full analysis with uListen AI
You mention “waves of aging” around ~35–40, ~60+. Which protein systems shift most at those inflection points, and are they modifiable by lifestyle or drugs?
Get the full analysis with uListen AI
Transcript Preview
For the first time, we could take an old brain, and we could give factors from a young organism and ask, "Is that going to change the age of the brain?" And that's indeed what it did. So we saw that, uh, there are stem cells in the brain of these mice, that they got reactivated. There was less inflammation, more activity, um, that we can measure in the brain. And then most importantly, we actually saw that their memory function improved.
[upbeat music] Welcome to the Huberman Lab Podcast, where we discuss science and science-based tools for everyday life. I'm Andrew Huberman, and I'm a professor of neurobiology and ophthalmology at Stanford School of Medicine. My guest today is Dr. Tony Wyss-Coray. Dr. Tony Wyss-Coray is a professor of neurology at Stanford School of Medicine and an expert in identifying factors that can help prevent and reverse organ degeneration and aging. Today, we discuss the factors that are present in young blood, yes, you heard that right, and the factors that are present in blood after exercise that have been shown to rejuvenate the brain and other tissues in older individuals. Dr. Tony Wyss-Coray's lab has discovered several proteins that are present in high amounts when we are young and that circulate in the blood and that diminish with age, and if these are supplied to the aged body and brain, can reverse key features of aging, including improved cognition, tissue recovery from stress, damage, and more. We also discuss how aging is nonlinear. It does not progress uniformly across the lifespan. And we discuss the fact that there are certain phases, such as puberty, your early 40s, and your early 60s, when aging is accelerated and then slows again. We also discuss how different organs in your body age at different rates and how you can measure that. Today's discussion is a very important one because so often these days we hear about anti-aging and longevity, but today you're going to hear about the real science of organ rejuvenation. We also are going to talk about the role of sunlight, fasting, hormones, and the use of specific molecular approaches to improve your vitality and health. We also, of course, discuss exercise and social interactions, but in the context of the specific molecules they release into your blood to promote and enhance health, and how you can leverage that information. Tony Wyss-Coray is a celebrated pioneer in the science of these topics because of the rigor he applies to the work. He's not just talking about some molecule that someday there'll be a drug or some activity that we already know promotes health. He's an avid tool developer for measuring and reversing aging. So today we discuss all of that, and you're sure to come away from the discussion with both tools to improve your immediate and long-term health, as well as a deeper understanding of the biology. Before we begin, I'd like to emphasize that this podcast is separate from my teaching and research roles at Stanford. It is, however, part of my desire and effort to bring zero cost to consumer information about science and science-related tools to the general public. In keeping with that theme, today's episode does include sponsors. And now for my discussion with Dr. Tony Wyss-Coray. Dr. Tony Wyss-Coray, welcome.
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