Joe Rogan Experience #1349 - David Sinclair
Joe Rogan (host), David Sinclair (guest), Narrator, Narrator, Narrator
In this episode of The Joe Rogan Experience, featuring Joe Rogan and David Sinclair, Joe Rogan Experience #1349 - David Sinclair explores david Sinclair Explains How We Might Slow, Stop, Reverse Aging Harvard longevity researcher David Sinclair joins Joe Rogan to discuss the latest science on why we age and how elements of that process may be slowed or even reversed. They cover drug combinations like metformin, DHEA, and human growth hormone that appear to reduce biological age on the Horvath epigenetic clock, as well as Sinclair’s own regimen of NMN, resveratrol, metformin, and lifestyle interventions. Sinclair explains emerging tools such as epigenetic clocks, senolytic drugs that clear “zombie” cells, and gene therapies that can rejuvenate tissues like the retina in mice. The conversation also weaves in practical issues—exercise, fasting, sleep, diet, alcohol—and broader ethical, medical, and societal questions around extending human healthspan.
David Sinclair Explains How We Might Slow, Stop, Reverse Aging
Harvard longevity researcher David Sinclair joins Joe Rogan to discuss the latest science on why we age and how elements of that process may be slowed or even reversed. They cover drug combinations like metformin, DHEA, and human growth hormone that appear to reduce biological age on the Horvath epigenetic clock, as well as Sinclair’s own regimen of NMN, resveratrol, metformin, and lifestyle interventions. Sinclair explains emerging tools such as epigenetic clocks, senolytic drugs that clear “zombie” cells, and gene therapies that can rejuvenate tissues like the retina in mice. The conversation also weaves in practical issues—exercise, fasting, sleep, diet, alcohol—and broader ethical, medical, and societal questions around extending human healthspan.
Key Takeaways
Biological age can now be quantified and may be reversible.
The Horvath epigenetic clock reads chemical marks on DNA (especially cytosine methylation) to estimate biological age and mortality risk. ...
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NAD-boosting compounds and sirtuin activators are central to Sinclair’s approach.
Sinclair’s lab links aging to declining NAD and sirtuin activity. ...
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Metformin may aid longevity but can blunt athletic gains, so timing matters.
Some studies show metformin improves metabolic health and potentially lifespan, but it can dampen exercise-induced mitochondrial adaptations and performance. ...
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Clearing senescent “zombie” cells is a promising anti-aging strategy.
Senescent cells accumulate with age and secrete inflammatory factors that damage tissues and promote disease. ...
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Gene therapies and cellular reprogramming could restore lost function in specific tissues.
Using viral vectors and a subset of Yamanaka factors, Sinclair’s group has rejuvenated old mouse retinas and even regrown damaged optic nerves, restoring vision and resetting epigenetic age. ...
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Lifestyle still does the heavy lifting: stress the body, then let it recover.
Across the conversation, Sinclair emphasizes intermittent fasting, maintaining leanness, regular strength and aerobic training, heat/cold exposure, minimizing sugar and refined carbs, moderating alcohol, protecting against UV/DNA damage, and prioritizing good sleep as foundational for slowing aging—drugs and tech are add-ons, not replacements.
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Extending healthspan could free massive resources and experience for society.
Sinclair argues that keeping people functional into older ages (like his very fit 80-year-old father) could save trillions in healthcare and care costs, while preserving wisdom and productivity. ...
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Notable Quotes
“What this study suggests is that it's not just about slowing down aging, but one day we could be 80, but biologically 30.”
— David Sinclair
“We’re right on the cutting edge of human knowledge. We don’t actually know what the best thing is.”
— David Sinclair
“Don't give me the argument that aging is natural, therefore it's acceptable.”
— David Sinclair
“As time goes on, you understand how you're interfacing with the world. You communicate with people better. You know how to get by.”
— Joe Rogan
“There'll be a time when you can't really tell how old somebody is, especially when we figure out how to reprogram the body to be young again.”
— David Sinclair
Questions Answered in This Episode
If epigenetic clocks can be reset, what ethical lines should we draw around who gets access to rejuvenation therapies and at what ages?
Harvard longevity researcher David Sinclair joins Joe Rogan to discuss the latest science on why we age and how elements of that process may be slowed or even reversed. ...
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How should athletes and highly active people weigh potential longevity benefits of drugs like metformin against the documented performance tradeoffs?
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What would a healthcare system optimized for extending healthspan, not just treating late-stage disease, practically look like?
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How might widespread senolytic and reprogramming therapies change our notions of retirement, career length, and intergenerational equity?
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Given the pace of gene therapy and CRISPR advances, how do we balance urgent treatment for severe diseases with the long-term risks of editing human biology?
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Transcript Preview
(clears throat) David Sinclair, Lifespan: Why We Age & Why We Don't Have To. I'm so happy there are people like you out there, 'cause I don't wanna age. I'm aging, clearly, but, uh, I'm not interested in it. I don't like it.
Yeah. Well, I don't know anybody who does, uh, Joe Rogan. Thanks for having me back on.
Thanks for coming back. The first one was a, a smash hit, man. People loved it. Uh, all my friends were very excited. But, uh, I had a question for you right off the bat, um, regarding Metformin. There was actually an article, I'm sure you saw it, recently, um, like within the last couple of days, that was going around through all the mainstream papers. It was, uh, talking about how for w- the use of Metformin, uh, DHEA, and w- was there something else as well that was taking two years-
Human growth hormone.
... human growth hormone, taking two years, two biological years off of people's lives in terms of their, their age, which are natural eight, which are actual ... I'm 52, it would make me 50.
Right. Even 49.5, according to the study.
Ooh.
Yeah.
That's what I'm looking for.
Yeah, that was a-
Get back to the fours.
... that was a good study. Uh, it, you know, it's only nine people, so we have to repeat this. Um-
Were they studs? Did you get like nine super athletes or did you get like schmoes that don't exercise?
Uh, I, as far as I know, these were just, uh, regular-
Schmoes?
... schmoes, yeah.
(laughs)
Which is good news for schmoes like me.
Yes. Good news. Yeah. Well, I mean, that's what you want. You don't want like ... Some people just respond better. They're, they have super bodies, you know?
Well, the gre- great thing about that, uh, study is first of all, I, I was with the first, uh, the main author on that paper, uh, while it came out. I was over in Israel, uh, as part of my journey up the, the great rift of Africa, ended up in Israel. Anyway, the guy there, uh, Steve Horvath is his name, uh, he and I and a couple of other guys are trying to figure out, uh, not just why we age, why we don't have to, but is aging, uh, truly reversible? And that's what this study suggests is that it's not just about slowing down aging, but one day we could be 80, but biologically 30.
Now, when we're talking about the biological age, how is that measured? Is this measured by the length of the telomeres? Is this measured by physical performance? Is it measured by a combination of these factors?
It's none of that.
None of that?
It's something brand new.
Ooh.
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