00:03Welcome to The Deep Dive.

00:05Today, we're digging into something pretty fundamental, a question humans have asked forever, really.

00:12Is ageing just inevitable, set in stone, or can we actually, you know, influence it, maybe slow it down?

00:19It's a huge question, and yeah, traditionally, we've kind of accepted it as a given, but the research we're looking at today, it offers a really different angle.

00:27Pretty exciting one.

00:28Definitely exciting.

00:29We're diving into research that feels, well, groundbreaking.

00:33Most people hear psilocybin and think mental health, right?

00:36That's the common association.

00:37But what if it also holds a key to, like, a longer, healthier, physical life?

00:42We're focusing on this pivotal new study out of Emory University.

00:45It's published in Nature Partner Journals, npj Aging, and honestly, it challenges a lot of the standard thinking about ageing, about lifespan itself.

00:53Yeah. So, our mission today is really to unpack what they found, these pretty surprising results, and then explore how the biology behind psilocybin's potential anti -aging stuff, you know, at the cellular level, and bigger picture.

01:09And finally, think about what this could actually mean for, well, for healthy living down the road.

01:13Okay, let's get right to it then, the big takeaway.

01:16The main conclusion from this Emory study is pretty bold.

01:20Psilocybin, or technically its active form, psilocin, seems to actively delay ageing in cells, and even in whole organisms. It's a strong claim, and they started in vitro, so looking at cells in the lab, not in the living body yet.

01:34Right, petri dishes.

01:35Yeah. And what they saw there was, well, kind of staggering.

01:38They used human skin cells, lung cells, and psilocin extended their lifespan, their cellular lifespan, by over 50%.

01:4450 %! Yeah. mean, think about that.

01:46That's not just tweaking things a little bit. That's a major shift in the dish.

01:50huge shift. And it suggests something pretty profound is happening chemically, but of course, the next step is crucial.

01:55Does it work in a living system?

01:57Exactly. So they moved on to an in vivo study, which just means in the living.

02:02In this case, mice.

02:04And this was actually the first long -term study looking at psilocybin's systemic effects on ageing in vivo.

02:09That's important.

02:10And these weren't young mice they started with. They were about 19 months old.

02:13Which is roughly like a 60 or 65 year old human.

02:16So already well into ageing.

02:19And the setup was they got an initial low dose, 5 milligrams of psilocybin.

02:23Then, for the next 10 months, a higher dose, 15 milligrams once a month.

02:28Okay. And the result, the mice getting the psilocybin, they lived 30 % longer.

02:34A 30 % increase in survival compared to the control mice.

02:37Wow.

02:3830 % is?

02:39That's substantial in a survival study like this. It really is.

02:42But here's what I found maybe even more interesting. It wasn't just longer life.

02:46seemed to be better life quality too.

02:48The study mentions they showed healthier physical features.

02:51Like what specifically?

02:52Things like the fur looked better, fewer white hairs popped up, and apparently they even saw some hair regrowth.

02:58That's fascinating.

02:59It ties right into what Dr.

03:00Ali John Zarrabi. One of the researchers; he is a palliative care physician-scientist.

03:05And his perspective is that the goal shouldn't just be adding years, you know, regardless of quality.

03:11It's about better aging, keeping function, keeping dignity.

03:14That quality of life piece.

03:16And these physical markers, the fur, the hair, they suggest it's not just keeping them alive longer, but keeping them healthier while they're alive longer.

03:25Adding life to the years, not just years to the life. That's such a key difference.

03:30okay, the big question then is how?

03:33How is psilocybin doing this biologically?

03:36The study says it influences multiple hallmarks of aging, not just one thing.

03:40Right. It's hitting several key areas.

03:42The researchers pinpointed three main mechanisms.

03:45First, it seems to cut down on oxidative stress.

03:48Okay. Oxidative stress.

03:50There's basically like cellular damage from unstable molecules, right?

03:54Rusting from the inside almost.

03:55That's a pretty good analogy.

03:56Yeah. It's a major driver of aging processes. reducing that is significant.

04:00Okay. less cellular rust.

04:02What's the second mechanism?

04:03Improving the body's DNA repair responses.

04:06Our DNA takes hits constantly, just from living.

04:09And how well our cells can patch up that damage is absolutely fundamental to staying healthy as we age.

04:16Better repair means less accumulated damage. Makes sense.

04:19Keep the instruction manual clean.

04:21And the third one, this is one people often talk about with aging.

04:24Telomeres.

04:26Preserving telomere length.

04:27Right. The little caps on the ends of our chromosomes. It's like the plastic bits on shoelaces. Exactly like that.

04:32They protect the chromosome ends, but every time a cell divides, they tend to get a little shorter.

04:38if they get too short, problems.

04:41Big problems.

04:42The chromosome can become unstable.

04:44The cell might stop dividing, malfunction, or even die.

04:47So keeping those telomeres long is crucial. It protects against the kind of genetic damage that can lead to age -related diseases.

04:53know, things like cancer, neurodegeneration, heart disease.

04:56So if you put those three together, less oxidative stress, better DNA repair, and longer telomeres.

05:02Yeah, you're hitting some really fundamental processes.

05:04If psilocybin can influence all three, that's, well, that's a powerful potential intervention against those chronic diseases and aging itself.

05:13now this next part, for me, was maybe the biggest surprise.

05:17We usually think of psilocybin affecting the brain, Serotonin receptors in the brain.

05:22That's the standard model for its psychedelic and mood effects.

05:25But the study points out something huge.

05:27Most cells in the body express serotonin receptors.

05:32Not just brain cells.

05:33Most cells. Yeah, that's a key finding.

05:35It implies that psilocybin's influence could be much, much broader than we thought. Systemic, really.

05:41So it's not just a brain drug.

05:42Apparently not exclusively.

05:44If these receptors are widespread, then psilocybin or psilocin could be interacting with cells all over the body, potentially influencing ageing processes far beyond the central nervous system.

05:54Wow.

05:55Hecker, she was the senior author on the study, she actually said this work opens a new frontier.

06:01A new frontier for understanding how psilocybin could affect systemic aging.

06:05Especially, she noted, when it's given later in life.

06:08Which is exactly what they did in the mouse study. They started the intervention when the mice were already old.

06:13Right. So it really reframes how we might think about this compound.

06:18And the context here is important too, especially thinking about the U.S.

06:21How so? Well, our life expectancy here, around 78.4 years, it actually lags behind a lot of similar developed countries.

06:30average more like 82.5 years.

06:33our progress in increasing lifespan has slowed down quite a bit since, what, 1980?

06:39Exactly. finding ways to promote healthy aging feels really urgent.

06:44Absolutely.

06:45And that's where this research could potentially fit in.

06:48The study itself concludes pretty optimistically.

06:50says psilocybin may have the potential to revolutionize anti -aging therapies.

06:55And could be really impactful for our aging population.

06:58Revolutionize, that's a strong word, but based on these mechanisms.

07:01It's provocative, definitely.

07:03And again, that finding that it helped, even when started late in the mice's lives, that's huge clinically.

07:09It suggests it might not be too late for intervention.

07:11And this isn't just sitting in a lab somewhere.

07:13Emory's already doing clinical trials, phase two and three, with psilocybin -assisted therapy for depression. Right.

07:20And Dr. Zarrabi, the co -investigator we mentioned, he's hopeful.

07:24He thinks if psilocybin therapy gets FDA approval for depression, maybe around 2027, the boost in mental wellbeing could actually go hand in hand with a longer, physically healthier life based on these kinds of biological findings.

07:37A potential two for one benefit almost.

07:40Sort of, yeah.

07:41Mind and body connection, maybe quite literally through these serotonin receptors. It's really compelling stuff.

07:46We should probably mention the key people involved too.

07:49Good idea.

07:50So Dr. Louise Hecker was the senior author. She started this at Emory, now she's at Baylor.

07:54Dr. Ali John Zarrabi, the palliative care physician and Emory's director of psychedelic research, was a co -investigator.

08:02And Kosuke Kato was the lead author on the paper itself.

08:05And the funding came from Emory School of Medicine, something called the i3 award, also the Georgia CTSA NIH award, and Emory Center for Health and Aging.

08:15Important to acknowledge that support.

08:16Definitely. It takes resources to do this kind of long -term, in -depth work.

08:22So before we wrap up, there's one slightly different thing we need to touch on, just for transparency about our source material itself.

08:28Ah, right.

08:29The license for the article we've been discussing. Yeah, even the way this information gets shared has rules.

08:36This specific paper is under what's called a Creative Commons Attribution No Derivatives 4.0 International Public License.

08:44Okay, what does that mean in plain English?

08:46Basically, people can share the original work, even use it commercially, which is quite open. There's always a but.

08:53Two big ones here.

08:54First, have to give credit, attribute it properly to the creators, mention the license, link back, all that.

08:59Standard attribution makes sense.

09:01Second, and this is the no derivative part, you're not allowed to share adapted material under this specific license.

09:07Adapted meaning.

09:08Changed.

09:09Translated.

09:11Modified.

09:12Exactly. If you transform it in a way that needs copyright permission, you can make those changes for your own use, maybe, but you can't share that modified version under this CC BYND license.

09:22You can share the original unchanged work freely with attribution.

09:27So, while the science itself is about potential transformation and change within the body, the rules around sharing the report about that science are quite specific about not changing the report itself when you share it. Kind of ironic, yeah.

09:40But it's important for knowing how scientific communication works, how we can responsibly share this exciting information. Good point.

09:47Understanding the how of sharing is as crucial as the how of the science sometimes.

09:52So let's just pull this all together.

09:54What have we really learned in this deep dive? Well, the core idea is pretty mind bending, isn't it?

09:59Psilocybin, this compound we associate with the mind, might have profound effects on physical aging, not just helping us live longer potentially, but living healthier by tackling some of the root causes of aging at a cellular level.

10:11Oxidative stress, DNA repair, telomeres. Yeah, it goes way beyond the brain. It suggests this deep, deep connection between, well, maybe our entire system's health and these signaling pathways.

10:24It really does.

10:25Which leads to, I think, a pretty provocative thought to leave you, the listener, with.

10:30Okay, what's that?

10:32If psilocybin can impact aging systemically through receptors found all over the body, what does that tell us about the web connecting our mental state, our neurological health, and our fundamental physical processes of aging?

10:45And thinking forward, how might this blur the lines?

10:49How might it change our whole approach to medicine? Maybe moving beyond treating separate symptoms towards supporting systemic well-being?

10:56That's a lot to think about.

10:58It really challenges the way we categorize things, doesn't it?

11:00Mental health here, physical aging over there?

11:03It certainly does.

11:03It suggests things might be far more interconnected than we typically assumed.

11:07Definitely something to mull over.

11:09How these findings might shift your own perspective on health, longevity, and maybe even the nature of well-being itself.