PDF Summary:Super Agers, by Eric Topol

Are disease and illness inevitable byproducts of getting old? Cardiologist and scientist Eric Topol argues that they don’t have to be—we already have the capabilities to safeguard our health regardless of how old we get. In Super Agers, he weaves together the latest research on disease prevention and longevity to explore methods and treatments you can take advantage of—now or in the near future—to live a long and healthy life.

This guide covers Topol’s key ideas—you’ll learn about the latest approaches for countering the four main diseases associated with aging, scientifically proven lifestyle changes that will reduce your risk of illness, and cutting-edge disease and anti-aging treatments you can expect to benefit from in the future. Throughout, we’ll expand on each of his ideas with perspectives and health tips from other medical practitioners and longevity specialists.

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(Shortform note: While research indicates that the Mediterranean diet can promote gut microbiome balance, there’s no guarantee that this specific diet will work for you. This is because, as Peter Attia (Outlive) puts it, everyone metabolizes food differently. The authors of Life Force add that many of your dietary needs depend on your ancestry: Different groups of people evolved to eat certain foods based on what was available in their environment. This affected their microbiome and, as a result, some people’s bodies are better at processing certain foods than others. Therefore, before choosing a diet, it’s worth having your gut microbiome tested to find out which foods are best for your health.)

Exercise Regularly

Topol explains how a sedentary lifestyle can cause inflammation: When you’re sedentary, your muscles don’t need as much fuel, so you’re left with excess calories from the food you consume. Your body converts these excess calories into fat, which it stores around your organs. As discussed earlier, this excess fat can make your cells resistant to insulin, which damages your cells and organs—forcing your immune system to trigger inflammation. Constant inactivity also weakens your muscles and stiffens your joints, which increases your likelihood of pain and injuries, creating yet more damage that triggers inflammation.

(Shortform note: Many studies back up Topol’s argument that inactivity contributes to numerous health issues and that regular exercise is key to strengthening your immunity. Despite the evidence, the prevalence of sedentary lifestyles is increasing globally. Research shows that around one third of the world’s adult population gets insufficient exercise, and that children are given fewer opportunities for exercise at school than they’ve had in the past several decades. Daily physical education (PE) classes used to be standard in US public schools, but budget cuts and a push for academic achievement has reduced it—fewer than 10% of schools now offer daily PE, and nearly a quarter have no PE at all.)

Topol recommends three types of exercise for countering the effects of a sedentary lifestyle:

1. Aerobic exercise: Activities that raise your heart rate—like brisk walking or cycling—speed up your body’s ability to burn excess calories and fat reserves. Aim for at least 150 minutes of moderate activity per week, or 75 minutes of vigorous activity.
2. Resistance training: Exercises that build your muscles—like weightlifting or squats—increase muscle mass, which causes them to burn more calories. Aim to train for at least an hour per week.
3. Balance training: Workouts that improve your flexibility and coordination—like yoga or pilates—strengthen your stability and reduce your susceptibility to aches and pains.

Fueling Your Workouts

Nutrition experts note that you can increase the effectiveness of your workouts through your eating habits. Dave Asprey (Fast This Way) recommends intermittent fasting, which can help your body burn more fat reserves during your aerobic exercise. This is because fasting deprives your body of glucose, which is what your body uses first as an energy source. With no glucose from food in your system, your muscles have no choice but to burn fat.

This can not only give you energy, it can also speed up your recovery after a workout, because when your body burns fat, it activates its anti-inflammatory properties. This enhances the benefits of balance training as well, increasing your ability to bounce back from aches and pains.

Michael Mathews (Bigger Leaner Stronger) adds that you can boost muscle growth and recovery by consuming 30 to 40 grams of protein within a few hours before or after a workout session. Eating protein before training gives your body the nutrients it needs to start the muscle-building process, and eating it after training replenishes nutrients that were depleted.

Regarding how long you should exercise, the World Health Organization (WHO) has a slightly different recommendation than Topol, suggesting it’s more beneficial to aim for around 300 minutes of moderate exercise each week.

Sleep Seven Hours Per Night

Sleep deprivation causes inflammation by preventing your body from completing essential maintenance work. Topol explains that during sleep, your body performs critical tasks that support your overall mental and physical health—such as flushing out toxins, repairing cellular damage, and regulating hormones. When you sleep fewer than seven hours per night, your body doesn’t have time to finish this work. As a result, minor, easily resolvable issues accumulate and compound, creating ongoing damage that triggers continual inflammation.

(Shortform note: Matthew Walker (Why We Sleep) agrees that seven hours of sleep per night is best for your body, and he adds that only 1% of the population can get by on six hours without suffering impairment.)

Topol adds that sticking to a consistent sleep routine is just as important as getting enough sleep. Your body’s internal 24-hour clock controls when your body shifts into maintenance mode. When you go to bed and wake up at the same time each day, your clock knows when to expect sleep, so it’s able to trigger physiological changes that help you fall quickly into the deep sleep stages where the bulk of the maintenance work takes place. However, when you sleep at different times, your clock doesn’t know when to prepare, so it takes you longer to fall into a deep sleep. Even though you might sleep for seven hours, you won’t be in a deep state long enough for the maintenance work to get done.

The Importance of Deep Sleep, Schedules, and Timing

Most health experts agree with Topol on the importance of maintaining a regular sleep schedule—even on weekends. They explain that shifting your sleep schedule can have a similar effect on your body as flying across time zones. However, some experts add a caveat: Sleep-deprived people should prioritize increasing their total sleep time, even if that means varying their schedule and catching up on sleep during weekends. It’s still best to work toward a consistent sleep schedule in the long run, but occasional short-term fixes can be helpful.

Shawn Stevenson (Sleep Smarter) adds that even if you’re consistent, you might still end up with low-quality sleep if you don’t sleep within certain hours of the night. He says that the optimal time for your body to shift into maintenance mode is from 10:00 p.m. to 2:00 a.m. During these hours, your body produces higher quantities of the hormones required for maintenance and rejuvenation. If your sleep schedule isn’t aligned with the 10:00 p.m. to 2:00 a.m. window, you may feel tired even if you’ve met your sleep quota.

Topol suggests that you’ll find it easier to stick to a sleep routine if you avoid two things:

1. Screen time in the evenings: Blue light prevents your internal clock from preparing your body for sleep by tricking it into thinking the sun’s still out.

(Shortform note: Dave Asprey (Super Human) also warns against blue light exposure. He advises replacing the lighting in your environment with red bulbs, wearing glasses that filter out blue light, and turning off all screens and dimming your lights two hours before you plan to sleep.)

2. Eating late: Your body needs three to four hours to digest food. This is an active process that prevents you from falling into sleep deep enough to perform maintenance.

(Shortform note: Most experts agree it’s best to wait around three hours after eating before going to bed. However, some caution that there are exceptions to this advice. If you struggle to maintain a stable blood sugar level, eating a small, nutrient-dense snack before bed may help you sleep better, as it can prevent your blood sugar from rising or falling sharply during the night.)

Limit Exposure to Environmental Toxins

Environmental toxins cause inflammation by disrupting hormonal balance and damaging tissues and organs. Topol explains that you’re constantly exposed to toxins in many different forms—for example, you breathe in exhaust fumes, consume foods contaminated by pesticides, and absorb chemicals from the products you use. Different toxins harm your body in different ways: Some are fat-soluble compounds that dissolve into fat tissue, where they alter hormonal and cellular processes. Others are synthetic compounds that your body identifies as threats but can’t metabolise or expel. Yet others are microplastics that physically lodge in your arteries and organs, where they irritate and damage surrounding tissue.

Because so many toxins come from our food, water, or air, it can be hard to avoid exposure. Topol does note, though, that you can minimize your exposure to a certain extent if you avoid foods packaged in plastic, stop using non-stick or plastic cookware and utensils, and test your home for contaminants like radon.

US Regulations Make It Impossible to Completely Avoid Toxic Exposure

While Topol’s recommendations can help reduce exposure, toxins are so pervasive that it’s almost impossible to avoid them completely. For example, you might:

• Ingest fat-soluble compounds when you eat pesticide-treated produce or consume meat, dairy, or fish.

• Absorb synthetic compounds through your skin from stain resistant furniture or clothing.

• Breathe in microplastics from the air or ingest them when you eat sea salt or seafood.

But why are these substances allowed to proliferate unchecked? Experts suggest that it’s due to several flaws in how the US regulates toxins:

Influence of the chemical industry: Key legislation, like the Toxic Substances Control Act, has been drafted with significant input from the chemical industry. As a result, these laws are more concerned with minimizing inconvenience to businesses than with protecting public health.

Legally, chemicals are considered harmless unless proven otherwise: In the US, it falls to the government to prove that a chemical is harmful before banning or restricting it, meaning that substances remain in circulation until regulators build a case against them.

Inadequate resources: The process of regulating chemicals takes years, and the Environmental Protection Agency (EPA) has struggled due to a lack of funding and staff.

The “Generally Recognized As Safe” (GRAS) loophole: Introduced in 1958, this rule allows companies to use certain ingredients without thorough safety review. Originally, companies had to ask the FDA to confirm their ingredients were safe, but since 1997, they can just declare a new chemical to be safe and add it to foods without telling the FDA. Almost all new chemicals added to US food since 2000 entered the market this way.

Cultivate Social Connections

Topol writes that loneliness and a lack of social connection greatly increases a person’s risk for decreased health and early death. He notes that the exact medical mechanism behind this effect is unclear, but the effect itself is undeniable: Isolation shortens lifespans on a scale similar to smoking and obesity. It increases mortality from all causes, but in particular from cardiovascular disease and cancer. In addition, it elevates a person’s risk of dementia by 50%.

Social isolation is a growing public health concern that’s been rising for decades. Topol writes, though, that the health effects of isolation can be reversed if people change their circumstances so that they have more contact with other people. For example, elderly people who are isolated see their standards of living improve if they move into senior homes where they can socialize with peers. In addition, increased physical touch, even just handshakes or hugs, has been shown to markedly improve a range of health outcomes, from blood pressure to mobility to depression.

Loneliness: Causes and Solutions

Vivek Murthy (Together) explains that our need for social connection has evolutionary roots: The better our ancestors could communicate and collaborate with others, the more likely they were to survive. As a result, our biology evolved to encourage social connections—for example, by releasing pleasurable neurochemicals whenever we have positive interactions with others.

Like Topol, Murthy calls loneliness a public health crisis, noting that it affects both physical and mental health: People who feel chronically lonely face a 26-32% higher risk of dying early compared to those with strong social connections, and they face higher rates of depression, anxiety, and suicidal thoughts. The effects extend beyond personal suffering, creating substantial costs for health care systems and workplaces—people who are lonely stay 64% longer at hospitals, visit the emergency room 29% more often, and are more likely to be placed in nursing homes.

Experts largely agree with Topol that you can counter the effects of loneliness by seeking out connections with others. Research supports his contention that when elderly people move into senior living communities, their health improves—both physical and mental. Such residences are increasingly designed to foster these benefits, offering physical and social activities to engage seniors. In addition, studies confirm that light, casual physical touch can improve mood and decrease loneliness. These results are consistent across various cultures, indicating an innate emotional need for physical contact.

Part 3: Medical Innovations for Disease Prevention and Treatment

Topol writes that lifestyle changes aren’t the only ways you can prevent disease. The medical field is developing numerous advances that can detect age-related diseases early and improve treatments for diseases that have already taken hold. In this section, we’ll review some advances with promise.

Advances in Early Screening

Topol reviews a number of screening protocols that can identify diseases in early stages, making them easier to constrain, treat, or even prevent. Some of these are tests he recommends for broad adoption by the general public, while others are interventions for people with elevated risk for specific diseases.

Broad Risk Screening

Topol writes that polygenic risk scores can be highly effective in assessing your risk for a wide swath of diseases. A risk score is an analysis of a range of variables that a genetic test can reveal. It can give you a more accurate assessment of your risk level for age-related diseases than typical detection tests like cholesterol-level measurements or family history analyses.

Topol notes that some health care systems already use these risk scores to proactively screen their members and have found that they enable patients to prevent or slow the progression of many diseases. He believes these tests should be more widely used by the population as a whole, as it’s no longer difficult or expensive to obtain basic genome sequencing—there are several private companies that offer DNA tests.

(Shortform note: The success of preventive screenings depends in large part on whether people are willing to pursue them. For genetic tests in particular, discrimination in insurance markets may reduce that willingness. While the Genetic Information Nondiscrimination Act (GINA) prohibits health insurers and employers from using genetic information to discriminate, it doesn’t cover life, disability, or long-term care insurance. Insurers in those markets can legally request access to genetic test results and use them to deny coverage or set higher premiums. This may discourage people who fear an unfavorable result from taking tests that could otherwise guide early intervention.)

Specific Disease Screening

Some specialized tests and medical devices can detect the early development of a disease more effectively than those currently in standard use. For example:

• Wearable sensors called continuous glucose monitors can detect blood sugar changes that might indicate early signs of insulin resistance and diabetes.
• Blood tests can measure levels of cholesterol-carrying particles in your blood stream, which can be a stronger indicator of your risk for cardiovascular disease than typical tests that measure overall cholesterol levels.
• Blood tests can detect faulty DNA shed by tumorous cells, enabling doctors to identify cancers before they spread.
• Tests can detect toxic proteins in the bloodstream that indicate the presence of brain deposits before they disrupt brain function, indicating early signs of neurodegeneration.

While most of the screening tests Topol reviews are intended for people with elevated risk profiles, he writes that some of them, such as the continuous glucose monitor, can be incorporated into a typically healthy person’s everyday routine.

Screening Tests: Advantages and Limitations

The tests Topol reviews show significant promise to improve treatment protocols. For example, measuring how many blood particles carry cholesterol can be far more revealing than standard tests that measure your blood’s cholesterol volume because the two are sometimes unrelated: You might have low cholesterol levels but have high levels of cholesterol-carrying particles, each capable of penetrating artery walls and contributing to plaque build up. Thus, a low cholesterol reading may miss the true extent of your risk for cardiovascular disease.

However, some of the tests and devices Topol reviews have limitations. Of those listed above:

Continuous glucose monitors are slightly less accurate than traditional blood glucose meters, and are more suitable for tracking blood sugar spikes than measuring exact glucose levels for medical purposes.

Tests for faulty DNA can’t identify where a cancer is located, so detection leads to multiple rounds of follow-up investigation—scans, endoscopies, or biopsies. They also produce a high rate of false positives, leading many people to undergo numerous unnecessary tests.

Tests for early neurodegeneration may make treatments seem more effective than they are due to lead-time bias: By detecting signs of a disease well before symptoms arise, it may appear like the disease’s progression is slower than normal simply because of the extended timeline between the diagnosis and symptoms, even if a treatment doesn’t actually change its progression.

Advances in Treatment Protocols

Topol also reviews medical advances that can improve treatments for diseases already in progress, promising to slow the aging process itself. In outlining these advances, he acknowledges that they won’t benefit everyone—they’ll likely reach the most privileged first and the most vulnerable last, if at all. Due to the lack of universal healthcare in the United States and slow regulatory systems, the communities that bear the highest burden of disease are often those with the least access to resources that could help them. Unless this accessibility issue is addressed, the already wide gap in healthy life expectancy between the advantaged and the underserved will continue to grow.

(Shortform note: In An American Sickness, physician Elisabeth Rosenthal expands on why this accessibility issue exists—and why the healthy life expectancy gap will continue to widen: The US healthcare system operates as a profit-driven market; its goal when developing, pricing, and distributing treatment is to maximize financial returns. So, treatments and resources always flow toward those who can pay the most, not those who have the greatest need.)

With that caveat in mind, let’s look at medical advances that incorporate artificial intelligence, gene editing, immune therapies, and anti-aging interventions on a cellular level.

Advance #1: AI-Assisted Treatment Plans

Topol suggests that AI tools have made it possible to create personalized disease prevention and treatment plans. These tools can integrate and analyze multiple layers of health data—such as DNA variants, blood protein levels, gut microbiome composition, and current medications. This analysis enables them to detect if you’re at risk of a disease and to offer customized lifestyle guidance and treatment plans.

(Shortform note: While the ability to analyze multiple variables is a plus, one limitation of AI tools is the black box problem: They fail to explain their reasoning. These tools often reach conclusions, but cannot say why they’ve formed those conclusions. This lack of transparency may slow adoption, as people are less likely to trust or act on recommendations they don’t understand.)

Advance #2: Gene Editing

Topol says that CRISPR genome editing can treat genetic diseases. This treatment modifies problematic DNA: It locates a specific gene sequence and either corrects or disables it. Regulators have already approved it to treat sickle cell disease, a blood disorder caused by a single faulty DNA letter, and scientists are now applying it to more common conditions. In early trials, researchers were able to permanently silence the gene responsible for excess LDL cholesterol production—potentially replacing a lifetime of daily cholesterol-lowering medication with a single treatment.

(Shortform note: While CRISPR has proved successful in treating sickle cell disease and has the potential to lower cholesterol, its relative ease of use compared to previous gene editing tools has sparked a new round of ethical debate regarding genetic manipulation. Unlike earlier techniques, CRISPR is cheaper and faster, making it accessible enough to be used in small labs worldwide. This lowers the barrier to misuse by bad actors. A further concern is that some of the edits may be heritable, passing themselves on to future generations who can’t consent to having their genome altered.)

Advance #3: Immune Therapies

Topol explains that immune therapies reprogram the immune system—either to detect and destroy threats more efficiently, or to stop attacking healthy cells. He discusses several approaches researchers are developing that aim to personalize patients’ immune responses so that their cells can better respond to the particular disease they’re struggling with.

To better destroy unhealthy cells: Scientists are developing shots based on vaccine technology, such as mRNA molecules like the ones used in COVID-19 vaccines, that can train the immune system to recognize and destroy various types of cancer cells. They’re also developing ways to reprogram CAR-T cells (a type of immune cell) by removing them from patients battling cancer, instructing the cells’ DNA and RNA to recognize and destroy that particular cancer, and reinserting the cells into the patient. Both approaches promise to personalize cancer treatments so that a person’s immune system can be taught to fight the exact type of cancer they’re afflicted with.

(Shortform note: One limitation of mRNA vaccines is that they need to be redesigned frequently to keep up with pathogen or cellular mutations. Such mutations change the protein markers associated with a disease or virus—so by the time the immune system learns to target and eliminate a specific marker, a new one might have already emerged. CAR-T cell therapy also has limitations; while it’s proven effective for treating blood cancers like leukemia, the extraction, modification, and multiplication process of the immune cells can take weeks, during which time patients typically receive chemotherapy. This can weaken patients’ immune systems to the point that some may be unable to proceed with CAR-T cell therapy.)

To stop destroying healthy cells: Topol explains that autoimmune diseases like lupus, multiple sclerosis, and type 1 diabetes share a common problem—the immune system mistakes healthy cells for threats. Researchers are investigating various ways to reprogram immune responses on a cellular level, training immune systems to ignore nonthreatening cells. These treatments are called tolerogenic therapy—they teach immune cells to be tolerant of other cells. Early clinical trials suggest this approach could put autoimmune diseases into lasting remission without the need for ongoing medication.

(Shortform note: Research isn’t yet advanced enough to confirm whether this therapy works in the long term. Unlike treatments that seek to produce a measurable physical change (like shrinking a tumor or reducing blood sugar levels), tolerogenic therapy aims to change how the immune system behaves. A patient may appear to be in remission, but there’s currently no reliable way to distinguish between the immune system having genuinely learned to tolerate healthy cells and the therapy simply suppressing immune activity temporarily. Without a measurable marker for success, it’s hard to know when—or if—it’s safe to stop treatment.)

Advance #4: Cellular Anti-Aging Interventions

Topol writes that in recent years, much attention has been devoted to how people might lengthen their lifespans, with influencers engaging in extreme diet plans and longevity clinics popping up nationwide. But, these anti-aging protocols are often based on faulty science. However, he notes there are some areas of research that show promise, offering hope that we may one day slow down cellular degeneration, and in doing so, lengthen not only people’s lifespans but also health spans. Two that he highlights are senolytic drugs and epigenetic reprogramming.

(Shortform note: Topol isn’t alone in pointing out the questionable practices of influencers and companies who promise longevity secrets. Some argue that longevity science isn’t truly aimed at improving health outcomes—it’s actual goal is profiting off the instinctive human fear of death. The value of such interventions remains an area of contentious debate among experts.)

1. Senolytic drugs: These drugs eliminate senescent cells—dysfunctional cells that linger in the body and secrete inflammatory proteins. Early-stage trials suggest that intermittent doses may rejuvenate tissues without harming healthy, functional cells.

(Shortform note: Though senescent cells can be harmful, they’re not entirely without value. They alert your immune system to the presence of dysfunctional cells so it can destroy them. Additionally, research suggests that some dysfunctional cells benefit your health by monitoring tissues for injury and stimulating nearby stem cells to initiate repairs. This means that in some cases, removing these cells would slow down the body’s natural healing process. Some researchers also warn that senolytic supplements might be dangerous because we don’t yet know their side effects, and others advise skipping them in favor of the lifestyle changes Topol recommends—like getting moderate exercise and eating a Mediterranean diet.)

2. Epigenetic reprogramming: With age, chemical markers accumulate on DNA and alter how genes function—those alterations often cause cellular dysfunction. Epigenetic reprogramming reverses those alterations by modifying the chemical markers. Animal trials suggest that it improves cellular function by enabling cells to behave like younger versions of themselves.

(Shortform note: Research suggests that this treatment may also restore coordination between cells. When a chemical marker alters a cell, it degrades and desynchronises that cell from neighboring cells. When markers alter multiple cells in the same tissue, those cells begin behaving differently, which disrupts their ability to coordinate among themselves. From that perspective, reprogramming might work by helping cells in the same tissue get back into sync with each other. This implies that this treatment may also cause dysfunction if it fails to ensure that all cells in a tissue revert to the same age and behavior.)