a16z Podcast - What Super Agers Reveal About Preventing Disease

Episode Date: May 14, 2025

American healthcare is in crisis—but what if we could change the system by preventing disease before it starts?In this episode of the a16z Podcast, general partner Vijay Pande sits down with Dr. Eric Topol, founder and director of the Scripps Research Translational Institute and one of the most cited researchers in medicine, to explore the cutting edge of preventive healthcare and longevity science.Drawing from his new book Super Agers: An Evidence-Based Path to Longevity, Topol breaks down why understanding the biology of aging—not reversing it—is the key to preventing the “Big Three” age-related diseases: cancer, cardiovascular disease, and neurodegenerative conditions. The conversation spans AI-powered risk prediction, organ clocks, polygenic risk scores, GLP-1s, and the cultural and economic shifts required to move from a “sick care” system to one rooted in precision prevention and extended healthspan.If you’ve ever wondered how data, personalized medicine, and AI can add seven healthy years to your life—and what it will take to bring those benefits to everyone—this episode is for you. Resources: Find Eric on X: https://x.com/erictopolFind Vijay on X: https://x.com/vijaypande Stay Updated: Let us know what you think: https://ratethispodcast.com/a16zFind a16z on Twitter: https://twitter.com/a16zFind a16z on LinkedIn: https://www.linkedin.com/company/a16zSubscribe on your favorite podcast app: https://a16z.simplecast.com/Follow our host: https://twitter.com/stephsmithioPlease note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures.

American healthcare is in crisis. We have a path to preventing disease. It isn't reversing aging. It's just preventing the age-related morbidities of the big three. If we can keep people healthier, healthier people would be much less expensive. Seven years more of health span, free of the major three diseases. Seven years? Who wouldn't take seven years? There's just billions of data points for each person.

person. There should be a reboot new standard of care based on intelligent partitioning of risk. We have to do better. The human obsession with living longer is as old as time. But in the last 20 years, we have learned so much more about human health and biology. So what do we know today, but what makes humans live longer? And do we have real evidence that longevity is an attackable Target? Today, you'll get to hear A16Z general partner Vijay Ponday in conversation with Eric Topal, who recently released his new book, Super Agers, an evidence-based approach to longevity. Eric is, among other things, the founder and director of the Scripps Research Translational Institute. He's also published over 1,200 peer-reviewed articles with more than 300,000

citations, making him one of the 10 most cited researchers in medicine. That resume puts Eric in a perfect position to write this book, teasing the signal out from all the noise around health in 2025. One of those inputs was the Welderly group that Eric studied, which was a study of 1,400 people, 80 plus, who had never developed a chronic illness. For comparison, according to Eric's book, among those 65 plus, 80% have two or more chronic diseases, and 23% have three or more, while about 7% have 5 or more. And again, that was the 65 plus group versus the welderly group of 80 plus. So what do we know about these quote super agers, people who not only have a longer lifespan, but a longer health span? Is it genetics or human agency? And do technologies

like AI, GLP-1s, gene therapies, or the ability to understand organ clocks meaningfully change that equation for the masses? If so, what difficult decisions do we have to make to rewrite the system today? Let's find out. As a reminder, the content here is for informational purposes only. Should not be taken as legal business, tax, or investment advice, or be used to evaluate any investment or security, and is not directed at any investors or potential investors in any A16Z fund. Please note that A16Z and its affiliates may also maintain investments in the companies discussed in this podcast.

For more details, including a link to our investments, please see A16Z.com forward slash disclosures. My joy to welcome Dr. Eric Topal to the podcast, Eric. Eric, thanks so much for joining us. I'm glad to be here, Rie. So you've written this really exciting book, Super Agers, an evidence-based path to longevity. And I think it's a very timely topic.

And I was curious for you to maybe set the stage for why you wanted to write it and how you see it in the context of other books that I've been coming out recently as well. Yeah, there were a few things that came together. We had done a big study we called the Welderly where we basically found very little in the genomes of people who had gone to the age of 87 on average with never having had an age-related disease.

So that was, of course, one thing that was part of it. The second was I got inspired by a patient I saw recently who was 98 and had never been sick. So never been sick? Yeah, her name is Lee Rissal. and her relatives had died in their 50s and 60s. That's her parents, her uncles and aunts. She was the outlier and say, why?

And then there were the books that came out. I had patients coming to me, they wanted me to write a prescription for apomycin or order a total body MRI. I said, wait, we've got to get the story straight. So these three things together were the impetus that, why don't I really get deep into this, everything we know today,

and then see if I could, lay out some blueprints for where we can go. It's coming into a world where American health care is in crisis. I was curious to get your take on where we are now in health care in the U.S. And where do you think we get to? Yeah, so there is this bifurcation, as I see it. You could call it like the Grand Slam where you get reversing of aging, so you keep people healthier bodywide.

And that's where we see all this remarkable investments in companies like Autos and reprogramming. synolytics and a long list, but they're really focused on a monumental task, which hasn't been shown in people, but rather in rodents. And some of the results are striking, and I hope at least one, if not all, these are successful. The other side of this is we made these big strides in the science of aging with all these layers of data that are using the metrics of aging, and why don't we use that to prevent the age-related diseases, cancer, cardiovascular, neurodegenerative. We've never done that in medicine to any appreciable extent.

And this is the opportunity because we have a path to preventing disease. It isn't reversing aging. It's just preventing the age-related morbidities of the big three. I think that's something that a lot of people may not realize is that the big three that you mentioned, cancer, heart disease, and Alzheimer's and dementia, that they're greatly exacerbated by age. And it's interesting because if you ever wanted to have something that could be a cure for multiple diseases, which would be one of the holy grails of medicine, it would be understanding the biology of aging. Where are we now in terms of things that we can use today? The first and perhaps the most extraordinary thing is it takes 20 years to get these diseases with rare exception.

You know, heart disease, almost all cancers and neurogenital, they are incubating for a very long time. They all have a common thread of a defective immune system and inflammation underpinning. They are preventable variably, so cardiovascular, 80 and 90% from lifestyle and related factors, modifiable factors, like your LDL cholesterol, that kind of thing. And cancer and neurodegenerative, just from what we know today with lifestyle factors, we're about half that can be prevented. So we have some knowledge about averting these diseases, but we have a lot more with all these clocks

and new layers of data that are really changing the face of all outgross of understanding the biology of aging. So maybe let's double-click on that. So you in your book outline the five dimensions of health. I was wondering maybe you could walk us through them. Yeah, sure, sure. So the first most important one is AI, because you need that to pull all this other data

we're going to talk about together. This moment that is so exciting is because we have multimodal AI, not only large language, but large reasoning models. Now... Well, especially I think when you're talking about AI, it's all the things people have seen with generative AI and so on,

but also just the ability to understand all this data that you're measuring from people. Yeah, because the other four are such big domains or dimensions. So the omics, it includes not just gene sequence or arrays, but it has all the proteins, all the proteomic panels that we can get, which we never could get before, inexpensively. It includes the gut microbiome, metabolome, and certainly epigenome or epigenetics. So the omics are rich. We are now seeing

moving towards things like the virtual cell. Then there is, of course, cells that have become a live drug where we can reset the immune system and cure autoimmune diseases like we've never done before. Could you give examples of that? Yeah. So in the last couple of years, we've seen unprecedented cures, I mean, ever had anything, lupus, progressive systemic sclerosis, even cases of multiple sclerosis, dermatomyocitis. So basically, it's a depletion of all the B cells, and when they come back, they have forgotten and what they were attacking. It's amazing.

Yes. It's really amazing. And that leads to the autoimmune reaction. But the bigger lesson is we have learned how to control our immune system, like a rheostat, and we're going to keep getting better and better as we measure our immunome. But when you can do that, when you can quash an autoimmune disease, or when you're trying to cure a cancer by just whatever it takes to keep bringing up that immune system specific to the tumor.

So the immune system is fundamental, and that also now is involving cells and vaccines. So vaccines now are capable of cures, of pancreatic cancer, kidney cancer, with these personalized vaccines using the proteins of the person's tumor. Yes. And these aren't clinical trials right now. Yeah, I mean, stuff like we've never seen. And that's just a frontrunner of what vaccines, that's to treat cancer. we're going to be using vaccines to prevent cancer.

Again, as we get older, some of us especially, our immune system is getting senescent and weak, and a vaccine, before there's any cancer, before there's anything else, could prop it up. We also have drugs to modulate our immune system well beyond checkpoint inhibitors. And so whether it's antibody drug conjugates, tumor infiltrating lymphocytes,

and all these different ways, it's hard to imagine that in the future we're going to lose people with cancer because of being able to bring their immune system to the highest level when we need it. But more importantly, preventing the cancer. We can do that now. That's what's exciting.

Well, and so if we put all this together, what does this mean for the individual? Like, how would their life change? What should people be doing? Yeah, so I call it Lifestyle Plus. It's a lot bigger than diet, sleep, and exercise. It's involving all the environmental burdens, air pollution, plastics, microplastics, nanoplastics, and forever chemicals.

And then there's other things like time in nature. So if each of us pulled out all the stops for the lifestyle factors, which is a long list, that will help. But it's not going to be only lifestyle factors that are the ways to prevent the big three age-related diseases. You know, you described a large range of things. from the sort of most almost sci-fi-like drugs that are in trials for preventing cancer to lifestyle.

When people think about lifestyle, it's maybe a little vague in their mind for what to do. How do you make that into a science or how do you help people take that to the next step to bring evidence into that? I go into perhaps great pains, high-density to cite all the studies that link. Like, for example, when you have really good sleep health

and deep sleep, what does that do to slow your brain aging, or, you know, if you drink sugar, sweetened beverages, what does that do to specific, not just risk of type 2 diabetes, but, you know, all cause mortality? So there are very compelling sets of data about lifestyles and these key outcomes and they're linked to healthy aging. I was amazed at how much data is out there that can help us. It's not just like in the era when we had polygenic risk scores and we can say, oh,

your risk for Alzheimer's, but we don't know when you're age 56 or 96. So what good is that? Yes. Now we're saying, we know it's within a couple of years between 77 and 79 that you're going to have mild cognitive impairment if we don't do these things, which includes the lifestyle factors. And it's much harder to get people to do all of stuff. They have no specificity that's about them.

Yeah. That they can change the arc of a condition, especially when it isn't our genes. The healthy aging story about a genetic underpinning is just not there. We studied that. It's minimal. I mean, maybe it's 10% of what accounts for healthy aging. Most of it is in the lifestyle factors and related matters such as the immune system not functioning properly too much, too little. Well, it's generally believed that just telling someone to eat better and exercise doesn't work. But what I'm hearing you say is that you have a way to do that by making it very personalized. Yes. I mean, there was a finished study that was on just a polygenic risk score,

which is rudimentary. And they gave that to a large cohort, and they studied whether that affected their lifestyle. And the results were remarkable. The people who got the data stopped smoking, changed their diet, changed their physical activity, really amped it up. So we know when people get data that's specific to them, a large proportion much more likely to make changes. Now, I'm not claiming that lifestyle is going to be the only part of the prevention story. But once you define the high risk and it's particularized to a person, that's a big part of how we're going to succeed. I could also imagine AI coming into this because one of the things AI is very good at is to take a set of data and maybe you can mask out the last bit. so you can maybe have someone's health records over 30 years and train on that

except for the last five years and see if you can predict the last five from the first 25. And once it gets really good at that, you can take my records and say, hey, look, Vij, if you don't do anything, this is where you're going to be. And we have 99% confidence on this. That would be pretty chilling. Yeah. Well, you're exactly right because the pinpointing here about the timing is so extraordinary. For example, with Alzheimer's, since we were talking about that,

you get a P-Tal 217. It's modifiable by lifestyle. You check it again in six months or a year. Now you have two data points, and you can say, with all the other data that's available, when you're going to see 18 years from now, 12 years, 4 years, mild cognitive impairment, unless these steps are taken. This was fully dependent on AI

on models that can just take all. this data. If we didn't have the science of aging and the AI, we'd be nowhere. We wouldn't be talking about this today. I wouldn't have written a book. Well, it's important for people not familiar with the term of health span. That's basically not just lifespan, but how long you can be healthy. Yeah, I don't think we really want to get to some age and be demented or compromise. What we're talking about is if you don't have heart disease, cancer, or neurodegenerative, you're pretty darn intact. You may have some achy joints and other matters, but those are the things that really interrupt our health span.

Now we're talking about health care meeting something different. To be preventative, and we'll talk about chronic in a second, how do we help make that mind shift? This is perhaps the biggest point so far that we've been discussing, because in medicine, and I've been in it for almost 40 years, we don't do primary prevention. The person has a heart attack, and then we get all over it. But for the most part, we don't prevent cancer. or we don't prevent Alzheimer's and neurogenital diseases.

It's been a desire, I would say a fantasy for millennia. Yes. But we are at a very different point right now. We have a path to prevention, primary prevention, not after somebody has one of these diseases. And that is what is extraordinary. And it was all these recent advances that led to this capability. And we've got to jump on it because it's exciting that we could actually

do this. Well, also the thing about prevention is that I've talked to doctors who very boldly assert that prevention doesn't work. Yeah. And I look at them a bit confused because I say, well, there's been numerous examples and they're like, well, name one. I was like, well, how about smoking? That's the prototype. We had this huge incidence of lung cancer, which has just disappeared now because we don't smoke in restaurants or airplanes and so on. But one of the things that I think about that movement is that while doctors played a significant role in that, that was also very much a cultural movement. Yes. And so we talked about lifestyle changing people's behaviors. I think some of this, or much of this, has to be as much cultural as medical. There's a definite cultural component

and tobacco is one of the most impressive, but there's so many others. Yes. I think what we've learned, like, for example, with sleep, I didn't pay enough attention to that. But with sleep, when you promote your own deep sleep, which we tend to lose a lot as we age, then you see much less dementia, Alzheimer's, even less cardiovascular and cancer-related illnesses, cases, and mortality, sleep regularity. We need to be more ritualistic about it. And there are many things just on sleep itself, no less about physical activity, about, for example, not just even resistance training, but balance, posture, things like that. So the more you go deep, nutrition especially,

we've learned a lot about that, convincing, compelling evidence, I would say, that you say these effects, we're talking about just with that seven years more of health span free of the major three diseases. Seven years? Who wouldn't take seven years? That's just with what we know today. Once we can define high risk,

which is one of the things we turn to with AI, that changes everything. because then you focus on that. Maybe let's turn to another aspect of it, which is the chronic disease aspect. Yeah. When we're talking about chronic disease, we're talking typically about diabetes, heart disease, cancer.

How do we start to make an impact in that? I don't know if you want to pick one, if you want to start with cancer. I think we can make a huge impact on cancer because we have just simple polygenic risk scores for all the common cancers. That's like one layer of data to say you're at higher risk. And we have multi-cancer early detection tests

that can pick up microscopic cancer. Why people would get a total body MRI when you could find microscopic cancer, not a mass on an MRI, which may or not be cancer. So we have some tools for cancer, but the one thing that I think is unanticipated is the Glyp-1 drugs,

the Ozympic-Zep-bound world. Yes. It's the most momentous drug class in medical history. And we've only seen part of story so far. In the book, I write about how it took 20 years to figure out that it wasn't just about diabetes, which is amazing. What if we had AI today and said, should we test it for obesity? Because the developers, Novo Nordisk and later Lili of these drugs, they only saw three or four pounds that people with type two diabetes would lose with these drugs. And this

woman in Norway scientist, Lata Newton, she kept pushing, we've got to try it in obesity, and they wouldn't listen to her because, well, she said, diabetics are not losing weight. They finally did it, and everyone knows a story, 20, 30, 50, 80 pounds of weight loss. Now, when you lose that much weight for people who are obese, you reduce the risk of cancer, you reduce the risk of heart disease and neurodegenerative disease. It wouldn't be surprising to me that now with pills that are remarkably effective to substitute for injections that can be much less expensively, that a large proportion of the population would be taking one of these drugs or even their successors, that is, those that are even more

potent and potentially with less side effects. So we have a drug class now, added to lifestyle factors we didn't have before. As you know, they are in big trials for prevent. preventing Alzheimer's in people who are not overweight. Yes. Okay. We're going to be doing a long COVID trial in people who are not overweight. The effects are really quite extraordinary. The ability to crack obesity.

Yes. We would have been happy just to do that. But all the other things that are coming from it, who would have thought that you could treat, prevent addiction? Yeah, that's remarkable. Yeah. The ability to reduce alcohol intake from heavy intake, gambling. I mean, the list just goes on because we're learning about the brain circuitry

on how these drugs. So some of the secrets of the gut-brain axis, which is tied into the immune system and it's tied into the science of aging, this is what's given us this newfound potential to change. We don't have to only rely on drugs, but there's this, as we discuss, this kind of interdependence. Well, and I think having lifestyle infrastructure with these drugs, that combination is particularly interesting because you can make sure that you can lose weight while keeping muscle and also hopefully patients can go off the drugs at least for some periods of time and not rebound we don't have encouraging data at the moment because at least half of people gain weight back when they stop and that's not good but I do think that we'll come up with a ways

to hopefully not rely on such a long-term commitment the results on muscle mass we'd been very worried about that. And I think when people combine taking the drugs with strength training, and we do know there's muscle mass loss just with weight alone, but that looks encouraging, even though the companies have been acquiring muscle-making drugs, that may not prove to be particularly necessary. Well, and I think one thing that's interesting is that another knock on lifestyle is if you're extremely obese telling someone to exercise, it's a hard road to just get started. Absolutely. And so this could jumpstart a better lifestyle that then could get locked in. That could be really miraculous. I've seen it in many patients, just what you said. Couldn't get them to

really increase their activity, but when they were thinner, everything changed. When you think about if we can make a huge dent, there's nothing more economically favorable for us at the public population health level if we can achieve this. And so what else would you put into the chronic bucket. I think one of the things that you've written about is AI plus all the things you can track. I think the ability to look at the organ clocks, which was initially reported here at Stanford by Tony Wiss Corey and his colleagues, and now validated and replicated by multiple groups, the fact that we can do that and have the brain, the heart, the immune system, and other vital organs, and we can say, this one organ of yours is,

is five years at a pace with your real age. Then we can integrate that with these other layers of data. Oh, if that's the case, what about your polygenic risk score? Is there anything pointing to that disease or organ? We can look at your whole body aging, epigenetic, Horvath clock. We can also look at specific proteins, like for example, for the brain, Ptow 217.

And what's amazing about that protein, which we can get now, and it's not that expensive, but that in itself gives us over a 20-year warning about mild cognitive impairment. It's modifiable exercise and lifestyle. We've seen people in studies that drop more than 50%, even up to 80%. And it's intriguing that it's not binary too,

so you could track the gradient. Exactly. And that would get particularly scary if it's increasing. So we're talking about people without symptoms, but are at high risk, have. Having this assets, I don't recommend any of these things that we're talking about until you know you have an increased risk. But once you do, then you say, hmm, I can do something about it and change the course of what otherwise would be that person's natural history. But the molecular clocks, this collection of proteins, this is something else that's striking.

The O-Link and somalogic, there's between 6 and 11,000 plasma proteins. What we've learned from them, the fact that there's three bursts of aging during our life is not just a linear story and the fact that we're learning about the underpinnings of diseases. But most importantly, we have these organ clocks that are inexpensive to get. The UK Biobank is only paying $50 per participant. And they've done $50,000 and done amazing data coming from it, but another $500,000 is in process. So it's not that expensive to get such rich data.

And when you start having genes and proteins and these other layers of data, that's when you find out what is making us unique and what we are at risk for during our extended time. And therefore, what we should do to change it and improve. Yeah. Well, let's take a step back because I think you've been laying out a very appealing picture for what we as individuals could do to improve our health span, get at least seven more years easy, maybe more and more and more

as the science improves. But you can also think about this from a societal level that the cost of health care is immense. Yes. Just the cost of health care to the U.S. government through Medicare and Medicaid is approaching $2 trillion. And we live in a time where the United States is a massive debt. There's a great desire to reduce the deficit or make the deficit

negative would be ideal. And you look at health care and people are scared that health care could be cut or something like that. And I think no one wants to remove services. But there is this alternative that is very natural from everything you're talking about, which is that if we can keep people healthier, healthier people would be much less expensive. Right. And we could have a win-win. How do we shift the system, whether we're talking about CMS or we're talking about insurers or providers? How do we shift the sick care system to be thinking about preventative and chronic? We have a barrier here because of the malincentives.

people could change their insurance companies at any time so the insurance company doesn't have a long view whereas other countries like when I did the review of the NHS for the government there they're well positioned in the UK in many countries except for the US have a better positioning for this if we could make prevention now that it is emerging as a reality the priority and say every insurer whether it's

Medicare, Medicaid, private insurers, if they don't pull out all the stops and make this a party, then, you know, we have to make some pretty drastic policy changes. We've not actually accepted yet that we have this newfound capability, which completely changes the economics beyond making a case for health span for a population possible. And as the people who need this the most are currently the least likely to get it to access. And so this is another issue, which if this only is for the affluent, if we don't take care of everyone, we're not going to achieve that goal. So it can't just be for people who can have the assets to get this. It has to be broadly, universally distributed.

How can we translate all the existing programs is something that could be, let's say, rolled out to Medicare? Yeah, I mean, I think that if we negotiated, the AI is software, it could be cheap, whether it's some proteins, a specific protein, polygenic risk score. These things can be done, $20, $50, cheaper than most any lab tests that we do right now.

If we could develop a package negotiated at a very low rate, One way that's really great, Vijay, about this, we don't have to wait 10 years to see the benefit. If we see the clocks all changing in the right direction. Oh, that's a great idea. We have an intermediate surrogate endpoint. So, like, for example, we use LDL cholesterol to know if we have a person's arteries in check.

We're going to have these proteins like Ptow 217 say, oh, well, all these preventative approaches are really kicking in. this should change the likelihood of or ever developing a neurodegenerative Alzheimer's condition. So we have the metrics again to get a short, quick assessment, are we making a different? If we did that through CMS, that would be phenomenal. But maybe we can get one of the big insurers to pilot this to make it possible. If Mehmet Oz is listening, maybe he'll get interested. I don't know.

Yeah, I think CMS is interested in what it can do to keep people healthy. reduced cost. That's the canonical win-win. I think also, as you've written about, AI could really have a huge role here, too, because prevention's expensive if you have to roll this out with GPs or NPs, but to roll out with AI could be very, very scalable. Yeah, and I think you made a point earlier about the AI is that as we do this and we do this at scale, it just keeps getting better. So that the ability to predict pinpoint temporally when a person is likely to develop one of these three conditions with 20 years runway if we can't do this for these three diseases we're not too smart if AI was before just a few years ago the capabilities wouldn't be there

and neither would these metrics of aging and all the science has done to catapult that that's what's presented a unique opportunity and if we don't do this we're just stupid well actually let's double click on that because there are a lot of enemies of the future. And maybe a nicer way to put it is that people could be skeptical. Yeah. And they're used to operating a certain way. They have a certain belief that this isn't going to work or for whatever reason. What would you tell them, like to your fellow clinical colleagues, to try to change their mindset from a sick care mindset to a preventative mindset. Yeah. I mean, to me, it's all about compelling data. Yeah. So, for example, the Alzheimer's drugs which don't really work and they're very risky but the reason they were bought into by the

FDA ultimately was because the amyloid came out on the scans right and they were a little bit in cognitive score improvement but here we have metrics that are extraordinary to help us as a bridge for compelling evidence ultimately you want to say we prevented these diseases in people that had definition of their risk and then active surveillance, preventive, pull out all the stops. Right. For example, speaking about waste, we do mass screening for cancer. We treat everyone as the same based on their age. And that's the only criterion for the screening, age.

We only pick up 14% of cancers from that mass screening, which costs over hundreds of billions of dollars a year. Now, what about 88% of women will never have breast cancer? Why do 100% of women have to go through this? And especially with Bay's rule, you could actually use priors that you could measure. And we don't do it. Yeah, yeah. And this is a corollary of what we're talking about it. Why don't we take the wrist profile and say, you know what,

to a woman or for a person having colonoscopy, you don't really ever have to have it, or you can have this once in your lifetime or twice, whatever, We don't treat people as human beings with particular aspects that we can define today. And why do you think that is? We're ingrained in stupidity. Maybe when these mass screening programs started, that was the best we could do. But we've known about polygenic risk scores, and we learn now about all these other ways to assess risk,

and then we added on the AI part of it. We have to do better. But just having the screening part cleaned up would save a tremendous amount of money. How much is that concerns about liability or other non-medical reasons? Right. You're bringing up another good point here because it's the standard of care. So that's the foundation for malpractice. It shouldn't be the standard of care.

There should be a reboot new standard of care based on intelligent partitioning of risk. So each of the cancers is a way forward to do this. we have to come up with new ways to screen that is based on risk assessment. And we don't do it, but that could be changed in a flash based on the data that exists today, which I review in the book. Well, that's all very rational. So I just want to double-click. What needs to change?

Then what's the process? Is this guidelines have to be done differently? And what's the process and what's the body that should be doing this? And why aren't they doing it? Well, I mean, we're seeing how we can have sleeping changes without data right now. So new policies can be made. If people want to have more proof points, that can be quickly, easily garnered. But we have to have the will.

The problem we have now is the amount of money that's being made by doing these screenings is humongous. So what is the incentive for the people that are, for example, doing the scans and the scopes and all this stuff? Do they want to change their practice? I don't know. I mean, does the American Hospital Association want to have people in their own home so they don't have to go to the hospital? I don't think so. We have some things here that need a little adjustment. Yeah, in any change, there's always new winners and losers, and the potential new losers will fight the change.

Yeah, we have a new way forward if we are willing to get it validated. And I hope we'll seize this opportunity because we may never get another one like this for a long time. And what's different now? Is it AI or is it just the confluence of all these things? Yeah, I think it's not one without the other. Once you have these new ways to assess risk and the ways to, I would not just call it intervene, you're really going after prevention, the way you can aggressively put someone in surveillance. So with imaging now, for example, we can use AI to tell if there's inflammation in the heart arteries, even without a significant narrowing. We didn't have that before. And we could also, if we need to, do brain imaging,

it's exquisitely sensitive. So we have different ways we didn't have before, and the AI part of it is this is beyond human capability. There's just billions of data points for each person. But with the ways that the models have progressed, there's a new day using AI to promote health and health span. So let's shift gears in talking about the future. Let's assume, things work out well. Yeah. What is the best case scenario that you think is plausible? What's the science that's coming on horizon? Let's say we all decide to make this shift towards prevention and chronic. What do you think we will get for it in our next five to ten years? Well, I think we'll start to see that people are eventually getting to much older ages than we are now without these

three major diseases. I think that's a gradual thing. It's not like we're going to see a light switch here, but that's what be the trend. We will see countries that will implement it because they don't have the obstacles that we have. We'll see much less of that and the shift, bending this curve to the people that are older and healthier gradually. We're not talking about curing. We're talking about preventing. It's a lot better than curing, but it takes time to see the benefit. That's a really deep line that prevention is better than curing. Yeah. I think maybe for professionals involved, curing is really cool. Curing's cool, but you don't want to go there

because it's much harder. Prevention is where it's at. Well, some of that is then even just changing doctor incentives. If we can get them to be rewarded. Prevention is maybe less connected to their actions it may seem, even though it could

have such a great societal benefit. Yeah, but, you know, and there are health systems that really do emphasize prevention, but they're rudimentary. Did you get your pneumococcal vaccine? you're drinking and your other social behavioral stuff

that's all type things they haven't worked we're talking about a whole revamping of what we mean by going into prevent mode one question I love to ask our guests I think I've asked

this before so it would be fun to get an update is what do you do for your own health yeah I've gone through some pretty major changes from the work that did to put the book together because I'm a cardiologist

I never really acknowledged that strength training, resistant stuff, was so important, no less balanced and posture. So I've totally changed that for me. I've never been this strong in my life. Awesome. Yeah, and it feels great.

I mean, yeah, I just, I never paid attention to it. I used to even, with patients I came in, I'd say, well, gee, you're really doing a lot of weightlifting here, but I was thinking to myself, well, they should be spending more time in a row, but we need both. Sleep was a big problem. with me, not sleeping, and particularly not getting enough deep sleep. So I got both a smart

watch and an aura ring to track that. I wear both every night. And whichever one has the highest number of minutes of deep sleep, I'm going with that. But they're usually concordent. But after you measure, how do you improve? Yeah. I had to go through a lot of changes. So I needed to get like a ritual when I'd go to bed, wake up, which I was erratic. about. And I also learned about when to exercise, what to eat, not to eat, all these interactions. When should you exercise? Well, early, if I can, not too late in the afternoon, but not in the evening. And for me, the morning had a negative interaction with sleep. Really? Exercising the morning for sleep. Yeah. I mean, I dragged all day because I do an hour, hour and a half if I can,

but the morning just wasn't working for me. But late afternoon, no late than that but also learning about whether it's alcohol other beverages how they affected me caffeine probably yeah so I basically I've gone from a deep sleep I've doubled it pushing I'm working on getting I don't know if I'll get to triple it but you know it's been a steady trend and it's been really great and giving me more energy more readiness and all that now the other one besides those two I've really gone after the nutrition so I didn't realize how much ultimate processed food I took it.

Yeah, it's so easy. Reading the labels. Now I don't even want to have a label to read. I just stay away from it. If it has a label and it has anything more than two ingredients, anything I don't know that would be an article. That's a really interesting point. Broccoli doesn't have a label.

Yeah. And the steak doesn't have a label. No, no. I just completely bought in now because these three age-related diseases, inflammation, all of them have been associated with the ultra-processed foods, a dose response even. and I have really cut that out. I mean, I couldn't relieve how much stuff I was eating that had this junk in there.

I'm also really attentive to things like plastics. I don't like to see anything being stored in plastic. I don't even like to use microwave, but putting something in plastic in a microwave, that is a triple whamper. But we are taking in these plastics in the artery with people, have a four-fold or five-hold risk of heart attacks and strokes. Once you see that study, it just is indelible.

So that's another big change. I'm much more focused on these environmental burdens. But the other thing is much more inclined now to take hikes in nature. Can you see the benefit of that? Yeah. I mean, I think that when I'm out in nature and, of course, the data I presented in the book, I always appreciate it, but now I can see its effects even more impact with respect to, for example, the best sleep, surprisingly. So what I've learned, I've tried to share, I don't really speak too much or write too much about myself in the book, but all these things I'm doing.

I mean, I believe in them. If I didn't believe them, I wouldn't have written about them. And it was after culling through, there's about 1,800 references in there so people can look at themselves and see what they think. But it's data that I've really been impressed. It's a body of evidence that ought to push us into this prevent mode. And I hope that eventually it will. Yeah. But that's maybe a great place to end.

I think we could follow your example. We could all be super-agers. Thank you, VJ. It's been a real pleasure. Thanks for listening to the A16Z podcast. If you enjoyed the episode, let us know by leaving a review at rate thispodcast.com slash A16Z. We've got more great conversations coming your way.

See you next time.