Читать книгу Super Human - Dave Asprey, Dave Asprey - Страница 10
ОглавлениеTHE CURIOUS CASE OF DAVE ASPREY
Until the age of five, I was a normal kid with few health problems. Then my family moved from California to New Mexico, and something in my biology changed. I started acquiring health problems normally reserved for people far older than I was. Today I recognize that my bedroom, which was in the basement of our new house and covered in water-damaged wood paneling (it was the 1970s), was full of toxic black mold. My own home was silently aging me, but nobody, least of all me, was aware of this at the time.
For the next two decades, I suffered from joint pain, muscle pain, asthma, brain fog, extreme emotions, and even weird, frequent nosebleeds. Out of nowhere, my nose would start gushing, and I had unending strep throat that came back every time I finished yet another round of antibiotics. After I got my tonsils out, I started getting chronic sinus infections instead. My body didn’t properly maintain blood pressure, so I often got dizzy, and I was easily fatigued.
At the age of fourteen, I was diagnosed with full-blown arthritis in both of my knees. I remember going home after receiving the diagnosis from my doctor, thinking, How can I have arthritis? That’s for old people. I had always been chubby, but now I was becoming obese. I developed tons of stretch marks, which also disturbed me. Weren’t those for pregnant women? I was just a kid!
And can we talk about man boobs? I grew mine when I was sixteen, which would make anyone self-conscious, especially a teenager. The only other guy I knew with a matching set was my grandfather. My hormones were dysfunctional, just like those of my aging relatives. Between the stretch marks and the man boobs, you’d never catch me with a shirt off. The very thought terrified me, and I’d never in a thousand years imagine that thirty years later, there would be a full-page shirtless photo of me in Men’s Health magazine talking about how I used the techniques in this book to get rid of that flab and replace it with abs.
When I got to college, I kept putting on weight until I had grown a size 46 waist. And my knees got even worse. I played intramural soccer, and my kneecap would become dislocated, so my leg would suddenly fold sideways in a sickening way. I got used to falling over unexpectedly when it happened. Besides the pain, this made dating really awkward. Who wants to date an obese twenty-year-old who might fall down at any moment, with stretch marks, man boobs, arthritis, and the lack of confidence that comes with having such things? Oh, and someone who was so fatigued that he often forgot names, was socially awkward, and could barely focus, even when he really tried? Not too many people, unsurprisingly.
More important than my lackluster social life was the fact that my body was aging before its time. I was well on my way to prematurely developing all four of the diseases most likely to kill you as you age—heart disease, diabetes, Alzheimer’s, and cancer—or, as I call them, the Four Killers. These diseases are all deadly, and each of them is on the rise.
Right now, about one in four deaths in the United States is connected to heart disease—that’s roughly 610,000 people who die from heart disease each year. Meanwhile, more than 9 percent of the population of the United States has diabetes, and that number rises to 25 percent for people over the age of sixty-five. The Centers for Disease Control and Prevention (CDC) estimates that 5 million Americans are living with Alzheimer’s, and this number is going up, too. The death rate due to Alzheimer’s disease increased a full 55 percent between 1999 and 2014. And last but not least, 1.73 million people in the United States are diagnosed with cancer each year, and more than 600,000 of them die from it.
Suffice it to say that if you don’t die in a car crash or from an opioid addiction, chances are that one of these Four Killers is going to drain your life and your energy (and your retirement fund) before you die in a hospital. It was certainly looking like that would be the case for me—and sooner than most people, given how sick I was.
In the 1990s when I was in my twenties, my doctor used blood tests to determine that I was at a high risk then for developing a heart attack or stroke. My fasting blood sugar was a whopping 117, which put me solidly in the range of prediabetic. I didn’t have Alzheimer’s, but I was experiencing significant cognitive dysfunction and often left my car keys in the refrigerator. And I may not have been at an obvious risk of cancer, but guess what nearly doubles your risk of certain cancers (including those of the liver and pancreas)? Diabetes1—which is also a risk factor for Alzheimer’s.2 Guess what else dramatically raises your cancer risk? Toxic mold exposure, which I had also experienced.
Even obesity itself is the second largest preventable cause of cancer. Your risk goes up the more overweight you are and the longer you stay that way.3 Bad news—75 percent of American men are obese, and so are 60 percent of women and 30 percent of kids.4 No wonder the Four Killers are on the rise. Are you going to let them take you out?
I still didn’t know what was causing me to age so quickly when I began a quest to discover how to fix my body. In the mid-1990s, we didn’t have Google yet, but we had AltaVista, and I worked at night teaching the engineers who were literally building the Internet. This meant I had the good fortune of having access to information that most people didn’t. I started doing a ton of research and buying whatever I could find that might help me slow down or even reverse my symptoms. I simply couldn’t imagine even more stretch marks or more joint pain as I got older.
An important part of this journey was connecting with one of the first medical doctors who specialized in the study of anti-aging, Dr. Philip Miller. Seeing him required what was a tremendous financial investment for me at the time, but I was desperate. My first visit with Dr. Miller was like nothing I’d ever experienced. He ran new kinds of lab tests that regular doctors at the time didn’t know existed, including the first real hormone workup I’d ever had. Then he sat me down and gave me the bad news: I had Hashimoto’s thyroiditis (an autoimmune condition that causes the body to attack the thyroid) and almost no thyroid hormones, and my testosterone levels were lower than my mom’s. (He had done a workup for my mom not long before, so he wasn’t exaggerating when he told me this.)
The news could have been devastating, but I was actually excited to have the hard data. I felt in control for the first time because I finally had real information and knew exactly what I needed to change. This was proof that it wasn’t just a deficiency in my effort or some sort of moral failing. It’s common to see your hormone levels drop off around middle age, but not in your twenties. Now I had proof that I was aging prematurely and not just lazy, and I was determined to turn things around.
Dr. Miller and I came up with a plan for me to restore my hormone levels to that of a young man using bioidentical hormones and continue to track my data. The hormones made an enormous difference right away. I got my energy back along with my zest for life. It gave me so much hope to know that I could actually reverse some of my health issues, which I now knew were common symptoms of aging. So when I heard about an anti-aging nonprofit group in Silicon Valley, now called the Silicon Valley Health Institute (SVHI), I decided to check it out.
As I sat there at the first SVHI meeting listening to people who were at least triple my age, I felt completely at home. These were my people, I realized. I had more in common with them than I did with most of my peers, except these people had decades of wisdom I didn’t. After the meeting, I stayed for a long time talking with a board member who at eighty-five years old was kicking ass and full of energy in a way that was amazing and seemed totally impossible to me—but that I was inspired to replicate.
For the next four years I focused completely on learning as much as I could about the human body. I studied medical literature, read thousands of studies, talked to researchers, and spent all my free time at SVHI learning from seniors who were actively reversing their own symptoms of aging. This completely changed the way I thought about health, as well as aging. I learned that there is no one thing that causes disease or that leads us to age. Instead, aging is death by a thousand cuts, the cumulative damage caused by little insults stemming mostly from our environment.
Then in the year 2000 I found a former Johns Hopkins surgeon who ordered a litany of tests, including some allergy tests that showed I was highly allergic to the eight most common types of toxic mold. That was the smoking gun. In order for my immune system to be sensitized to those toxic molds, I must have been exposed to high levels of them, which wreaked havoc on my cells. This was one of the unexplained environmental factors that had made me age so rapidly.
My premature aging makes complete sense to me now. Mitochondria, which are bacteria embedded in most of our cells, power our energy production. Back when we were single-celled creatures, we became host cells for ingested bacteria. Over millions of years of evolution, the host cell became humans, the ingested bacteria became mitochondria, and today neither of us can survive without the other. Mitochondria are not of human origin; they even have their own DNA. And what has posed a lethal threat to bacteria since the beginning of time? Mold.
This means the very powerhouses of my cells were constantly engaged in a battle with their mortal enemy, and this fight left behind many casualties. When cells are under chronic stress, their mitochondria cannot make energy efficiently. This leads to an increase in the production of molecules called reactive oxygen species (ROSs), also known as free radicals. ROSs are unstable molecules that contain atoms with unpaired electrons, making them highly reactive. When an excess of free radicals are present in cells, they cause a chemical reaction that damages your cellular structures in a process called oxidation.
This is exactly what happens as you age, whether or not toxic mold is present in your life: Mitochondria function steadily declines, leading to an increase in free radicals, which damage your cells. In response, your body sends vitamin C from food to the liver so it can produce antioxidants, which fight off free radicals. The problem with this process is that it leaves you without enough vitamin C to produce collagen, the protein in the connective tissue of your skin, teeth, bones, organs, and cartilage. Vitamin C interacts with amino acids to build collagen, but only if you have enough of it. Your body will gladly sacrifice healthy blood vessels and skin in favor of fighting off free radicals that are draining its energy source.
This is precisely why I had stretch marks and vascular issues (manifested as nosebleeds) and why most people don’t develop these symptoms until they’re much older. The fight in my body between my onboard bacteria and mold left me constantly depleted of antioxidants. And my mold-damaged mitochondria also laid the groundwork for prediabetes, poor blood flow to the brain, arthritis, cognitive dysfunction, and, according to one doctor, a high risk of stroke and heart attack. I was still in my twenties, but I was biologically old because my mitochondria were slowing down. And it really pissed me off.
MITOCHONDRIA AND THE FOUR KILLERS
As I fought my way back from experiencing the many symptoms of aging, my likelihood of dying from the Four Killers dropped dramatically. That’s because—surprise, surprise—they all have one underlying issue in common: the cumulative damage to your cells, and in particular, to your mitochondria, that takes place over the course of a lifetime. This damage occurs in all of us, though at varying rates. Some damage stems from the bad choices we make, but much of it is simply the price we pay for the basic functions that support life—like metabolizing food and breathing.
You die a little bit every day from these cuts that make you weaker in the short term and hasten your decline in the long term. Staying alive requires avoiding as many of those cuts as possible, but they are all around you—in your food, your air, your light sources, and throughout your environment. You may not associate these cuts with your likelihood of aging prematurely or of developing a degenerative disease, but like every other aspect of your biology, they are all connected. The cuts lead to aging, aging leads to disease, and disease leads to death.
If you’re in your twenties or thirties, you may think you’re in the clear—that these cumulative cuts aren’t affecting you yet. But the cuts from bad choices or a toxic environment begin to add up from an early age—and they’re hurting you even if you’re not currently feeling their effects (such as weight gain, brain fog, muffin top, and fatigue). And it’s a lot easier to avoid damage to your mitochondria than it is to reverse it later.
Your mitochondria are responsible for extracting energy from the food you eat, and then combining it with oxygen to produce a chemical called adenosine triphosphate (ATP), which stores the energy your cells need to function. When your mitochondria conduct this process efficiently, they produce lots of energy so you can perform at your greatest potential—like a young person. But if your mitochondria become damaged or dysfunctional as you age, they begin producing an excess of free radicals in the process, which leak into the surrounding cells and lay the groundwork for the Four Killers. Congratulations, you are now old.
Even young, efficient mitochondria produce some free radicals as by-products of creating ATP, but they also make antioxidants, compounds that inhibit the damaging effects of free radicals. This is why products containing antioxidants have “anti-aging” properties. While popping antioxidant supplements and using skin-care products containing antioxidant-rich ingredients are worthwhile interventions, they are, frankly, the low-hanging fruit of our Super Human tree. For you to truly remain young, those antioxidants have to be produced by your body—your mitochondria must create at least as many of them as it does free radicals. When your mitochondria become inefficient, they make an excess of free radicals and fewer antioxidants. And you can’t slather enough serums onto your skin to fully counteract the damage created by this imbalance.
Your mitochondria are also in charge of triggering cellular apoptosis, programmed cell death that occurs when a cell is old and/or dysfunctional. If your mitochondria are sluggish, they may not trigger apoptosis at the right times, which can result in healthy cells dying off before they should or dysfunctional cells sticking around past their prime and aging you before your time.
When you’re still young and exploding with mitochondrial energy, you can take some of these hits. You can eat garbage, drink too much cheap beer, forgo sleep, and still function pretty well because you’re producing lots of antioxidants and energy. As you get older, you start to see that you can’t stay out all night drinking and still really bring it at work the next day. By the time you wake up to this new reality, you’ve already taken a lot of hits that will age you in the long run. But you’re likely to keep running at the edge of what you can perceive, so the damage stacks up without you even knowing it.
Well, what if you made better choices throughout your life so you took fewer hits over the course of decades? Then when you got to the age of seventy you might look and feel more like fifty because you simply suffered less damage. You’re never going to be able to avoid all the cuts—again, simply breathing creates some amount of wear and tear over time. It’s a matter of preventing as much damage as possible, which happens to dovetail nicely with the first rule of biohacking: Remove the things that make you weak. This is in and of itself a powerful anti-aging strategy.
When your mitochondria start to slow down and create an excess of free radicals, the result is widespread chronic inflammation throughout your body. Inflammation is such a hot topic in the field of longevity that you probably already know how closely it’s linked to aging. When I was sick and old as a young man, I knew I was inflamed, but I had no clue this stemmed from mitochondrial dysfunction, nor did I know that inflammation was more than a painful annoyance. I had no idea that inflammation creates the ideal circumstances for each of the Four Killers to thrive.
HEART DISEASE
A condition known as atherosclerosis, hardening of the arteries, is the first obvious clinical sign that heart disease has started. But what causes this? A thin layer of cells called the endothelium lines your arteries. When the endothelium is damaged, fats can cross into the arterial wall and form plaques. This is bad enough, but when your immune system picks up on the fact that this is happening, it creates chemical messengers called inflammatory cytokines to attract white blood cells to those plaques. This is an inflammatory immune response. When those plaques rupture because they are so inflamed, blood clots form, and these clots are the real cause of most heart attacks and strokes.
While some doctors are hesitant to definitively state that inflammation causes heart disease, it’s hard to refute the evidence that inflammation is a big step in the disease’s process, and most functional medicine practitioners now identify inflammation as a bigger health risk than cholesterol levels. In a landmark study conducted by researchers at Brigham and Women’s Hospital that followed ten thousand participants for twenty-five years, the data revealed that participants who reduced their inflammation levels also significantly lowered their risk of cardiovascular disease and the need for heart surgery without any other medical interventions.5
A new study out of the University of Colorado at Boulder shows that your gut bacteria actually play a role in the inflammation behind atherosclerosis.6 As animals (and likely humans) age, changes to gut bacteria harm the vascular system and make arteries stiffer. That stiffening came from inflammation. The gut bacteria of older mice actually produced three times the normal amount of an inflammatory compound called trimethylamine N-oxide (TMAO). When researchers used antibiotics to knock out the old mice’s gut bacteria, their vascular systems magically returned to those of young mice. The researchers concluded, “The fountain of youth may actually lie in the gut.” After following the lifestyle recommendations in this book, I am happy to report that my last test showed that I had zero species of gut bacteria that produce this harmful compound!
Even more mind-blowing, a 2017 study out of the University of Connecticut in Storrs revealed that the fat molecules that form plaques in your arteries come not from the fat in the food you eat, but directly from bad gut bacteria.7 This turns everything that conventional doctors tell us about dietary cholesterol on its head and means you have permission to laugh when people repeat the myth that a “plant-based” diet is better because it doesn’t contain saturated fats like butter that will somehow “stick to” your arteries. It also shows the importance of healthy gut bacteria and mitochondria for a long and energetic life. (More on this in chapter 11.)
We know that the mitochondria in our cells, which themselves evolved from bacteria, communicate with the bacteria in our gut. Bacteria communicate with one another via chemicals (like hormones), light, or physical movement. They even gather around and trade bits of their genetic code in a microscopic swap meet for bacteria superpowers. This is called a plasmid level exchange. Imagine a group of Marvel superheroes hanging out at headquarters. Wolverine says to Spider-Man, “Do you want my ability to grow claws? I’ll trade you for your super speed.” This happens constantly in our guts and in the world around us, which is why drug-resistant bacteria spread so rapidly. It’s also why we must end industrial livestock practices that require antibiotics. The bad bacteria that evolve in that environment find their way into your gut and make it hard for you to live well for a long time.
So there is clearly an inflammatory and gut bacterial connection to heart disease. Plus, we know that when you have the right kind of bacteria in your gut they can actually transform the foods you eat into short-chain fatty acids, which are highly anti-inflammatory. Nurturing healthy gut bacteria is one of the most important things you can do to become Super Human, and you’ll learn how later.
Look, I remember what it felt like when my doctor, complete with white lab coat, looked right at me and said in a matter-of-fact voice, “You are at a high risk for heart attack and stroke.” I recall the bewilderment and fear in my gut as I stared my own mortality in the face. That happened when I was still in my twenties, and thanks to the information in this book, it is not an issue for me anymore. But even when I was just a kid, I had symptoms of cardiovascular issues, specifically blood pressure instability, a condition normally reserved for much older people. When I stood up quickly, my blood pressure was too low to keep oxygen in my brain. This caused me to start seeing stars and feel extremely fatigued. As a youngster, I would lean my head forward after getting out of a car in order to avoid seeing stars. I was so used to this that I thought it was how everybody lived.
Now I know these were symptoms of postural orthostatic tachycardia syndrome, or POTS, which is often triggered by toxic mold exposure but can also happen with age. In either case, inflammation disrupts the line of communication between the nervous system and the endocrine (hormonal) system. The disruption of these signals leads to fatigue and blood pressure instability, and can lead to symptoms of attention deficit disorder (ADD)8 and Asperger’s syndrome,9 which I certainly exhibited as well.
This manifested in my not knowing the names of most of the kids in my class, even at the end of the school year. I had zero facial recognition and no understanding of basic social skills. My body was filtering out those signals to conserve energy because my biology was so trashed. Our bodies will always prioritize survival over socialization, and I didn’t have enough energy to go around.
It may be hard to comprehend how cognitive symptoms could be connected to vascular issues, but as you will learn in this book, everything in the body is connected. And that includes the diseases that age us and too often lead to premature death.
DIABETES
While the idea of inflammation “causing” heart disease remains controversial, we have definitive proof that type 2 diabetes is an inflammatory disease,10 and having diabetes dramatically increases your risk of cardiovascular issues. More than ten years ago, researchers discovered that when macrophages—immature white blood cells that play a key role in the immune response—find their way into otherwise healthy tissues, they release inflammatory substances called cytokines that cause nearby cells to become insulin resistant.11
In insulin resistance, the body has an impaired response to insulin, which is normally responsible for moving sugar out of the blood and into your cells. The result is that your blood sugar levels are not well regulated and become chronically high. Because chronic high blood sugar will eventually lead to diabetes—a disease in which the pancreas is unable to produce enough insulin to keep up with the body’s demands—a diagnosis of insulin resistance is most often accompanied by the label prediabetic. Prediabetes is so common now that it almost seems like no big deal. The CDC says that more than one out of every three Americans is prediabetic. But it is actually a huge deal because having diabetes dramatically increases your risk of developing the other killers.
Excess blood sugar causes damage to the entire vasculature, so if you have diabetes, you’re more likely to have heart disease or a stroke. High blood sugar also causes dangerous nerve damage by injuring the walls of the capillaries that bring blood and nutrients to your nerves. This is called peripheral artery disease, and it is especially common in the legs and feet, which is why you may have heard of people suffering from diabetes needing foot or leg amputations. When this happens in the eyes, it causes blindness. If that’s not bad enough, diabetes can damage your kidneys’ filtering system, resulting in kidney disease. And finally, the higher your blood sugar, the greater your risk for Alzheimer’s disease, to the point that some researchers call Alzheimer’s “type 3 diabetes.” So you’ve got to keep your blood sugar levels stable, no matter what.
You may think you’re off the hook if you are not overweight, but you can be thin and still be prediabetic (or even fully diabetic). Those problematic macrophages are most likely to trigger inflammation in adipose tissue, aka fat. So the more excess fat you’re carrying, the higher your chance of becoming insulin resistant and developing type 2 diabetes. But the same thing can happen if you are not overweight but have excess visceral fat, which is the type of fat that’s packed around your internal organs instead of underneath the skin. This “skinny fat” is even more dangerous than fat you can see.
There is new evidence that maintaining normal amounts of muscle strength as you age can help ward off this killer. In a study following five thousand people for over twenty-five years, participants were given regular strength tests. The risk of diabetes was slashed by 32 percent in those with even moderate muscle strength as opposed to those with low muscle strength.12 The reduced risk did not change if the participants were even stronger, so you don’t have to get ripped to live longer, but you should avoid carrying excess fat.
I had no idea as an obese teenager that inflammation was making it difficult for me to control my blood sugar. Instead, I bought into the myth that I just wasn’t trying hard enough to lose weight. I exercised a ton and constantly watched what I ate. For breakfast, I had Grape-Nuts, which were supposed to give me energy, and skim milk, which was meant to do my body good. But they did neither of those things. I distinctly remember one morning in ninth grade eating a bowl of Grape-Nuts with skim milk to prepare for a big soccer match. I was convinced this was a healthy breakfast, but I didn’t perform very well in the game. I thought to myself afterward, Well, that didn’t work the way it was supposed to.
This was the first time I questioned conventional wisdom about what was actually good for me. It would be many more years before I started to get real answers, but in my desperation I started experimenting with things that no teenager should need to explore. I was sick of feeling like an old man. So I started reading everything I could get my hands on that offered some advice for how to feel and perform better. While my peers were (I assume) out drinking and having fun, I was at home biohacking.
For my knee pain, I tried the glucosamine pills from the health food store, and they brought some serious relief. I didn’t know it then, but glucosamine inhibits glycolysis, your body’s breakdown of glucose (sugar). As a result, your body has to get energy from fat instead of sugar, which helps prevent insulin resistance. Recent research on mice has found that glucosamine promotes mitochondrial biogenesis (the birth of new mitochondria) and mimics the effects of calorie restriction.13 And there are plenty of studies to show that calorie restriction (a diet consisting of fewer than 1,200 calories a day) in conjunction with good nutrition extends life-span. In mice, calorie restriction can extend life-span by as much as 40 percent. Most researchers estimate that the impact on humans is more like 10 percent, which is still pretty amazing14—if you’re willing to be hungry, anyway.
If you’re like most people, you don’t enjoy feeling hungry, and you don’t want to restrict your calories to fewer than 1,200 a day. The good news is that researchers have been testing compounds that mimic the benefits of calorie restriction without the starvation. Glucosamine is one of those compounds. In one study, glucosamine extended the life-span of mice by 10 percent.15 And it most likely helped with my knee pain because of the way it impacted my body’s sugar metabolism.
Despite this small win, I was heavier than ever and fed up. In college I spent eighteen months working out six days a week for an hour and a half at a time while on a low-calorie, low-fat semi-vegetarian diet with lots of rice and beans and everything that was supposed to be good for me. I got really strong, but I was still covered in blubber, and later blood tests revealed that I was prediabetic thanks to all that fat and the inflammation it was fueling.
I knew something had to change, but I had no idea what that thing was. Then one day while I was at a coffee shop getting my daily fix, I spotted a weightlifting magazine on a rack. No one I knew in my small farming town read weightlifting magazines, but something on the cover caught my eye. It said, “How to grow abs!” Looking down at what I had grown—which you could more accurately call flabs—I thought, I have to read this. The goal seemed impossible in the world I lived in.
As I sipped a triple latte, I read an article by a body builder with impressive abs who said that sugar and carbohydrates make you fat. That advice was radical at the time and is still mildly controversial today, but it has become much more widely accepted since we know for a fact that sugar causes inflammation.16 Even small spikes of blood sugar have a particularly bad effect on your vascular system (and raise your cancer risk, too).17 I grabbed the magazine, went home, and made a smoothie out of cottage cheese and orange juice. I had no idea what I was doing! But that gross smoothie still had fewer carbs than I was used to eating in my efforts to get healthy.
I started eating more protein and avoiding grains and most obvious sources of sugar, for the first time focusing more on what I didn’t eat (carbs) than how much I ate. In three months I lost fifty pounds, but more surprising were the changes to my personality. Everyone in my life noticed that I was a lot nicer, and I actually started to develop friendships. I had changed my biology enough that I wasn’t exhausted all the time, and my brain was able to learn how to connect with people, even though it still didn’t come naturally to me. My focus in class also improved, and my GPA went up dramatically, from a 2.8 the previous semester to a double course load with a 3.9.
That’s right—avoiding grains and sugar helped me reduce inflammation, stabilize my blood sugar, get smarter, and change my personality for the better. Once again, everything is connected. Realizing I’d been fed a bunch of lies (literally) about what to eat for most of my life, I dug into the research and tried different strategies, evolving from the cottage cheese smoothie to the Zone diet to Atkins. (Though I never got anywhere close to the abs promised in that magazine.) Eventually I realized that there had to be a science to this. There were clearly foods out there that acted as kryptonite, caused inflammation, and completely threw me off of my game. And when I ate them, I not only felt awful, but I was also one step closer to developing type 2 diabetes. It took me years, but I finally discovered what those inflammatory foods were and how to avoid them. You’ll read more about this in chapter 3.
ALZHEIMER’S
Just as immune cells in your body fat create inflammation that contributes to diabetes, there are specialized immune cells in the brain called microglia that perform similar functions. They control the brain’s immune and inflammatory response and are also in charge of killing off dysfunctional neurons in a process similar to apoptosis. The microglial cells constantly monitor the brain, and when they sense a threat, they trigger the release of inflammatory cytokines to attack and remove potential pathogens. This process causes inflammation, and if it becomes chronic this can damage or kill neurons, causing memory loss and other cognitive problems.18 Many researchers now believe that this is the root of Alzheimer’s.
In my twenties I was already experiencing significant cognitive dysfunction, and I wondered in the back of my mind if I was on track for developing Alzheimer’s. When I was in business school in the 1990s, my performance on tests was horrible. On exams with math questions, my grades showed a linear decline in per-question scores—100 percent on the first question, 70 percent on the next, 30 percent on the next, and directly downhill from there. My brain got fatigued so easily, even when I studied and knew the answers.
This experience led me to imagine what would happen if I couldn’t rely on my brain to earn a living. I’d had a successful career so far, but suddenly I wondered if I wasn’t as smart as I thought I was. I decided to undergo a then controversial brain imaging technique called a SPECT scan to see what was really going on in my brain. It showed that my prefrontal cortex—the part of the brain involved in complex thinking and decision-making—had essentially no activity when I tried to concentrate. Dr. Daniel Amen, who was one of the first people in this country to use SPECT scans, was shocked that I had been even remotely successful in my career with such clear cognitive dysfunction.
Once again, receiving bad news actually came as a relief. It was incredibly validating to hear that there was indeed a reason why everything felt like such a struggle. The issue wasn’t lack of effort or intelligence. It was an actual biological problem, a hardware problem. And there were lots of little-known things I could do to reduce inflammation and improve my brain function. When I found these interventions, the impact was immediate and allowed me to get smarter and faster with each passing year. The good news is that once you know them, the interventions are simple and practical.
If you’re in your twenties or thirties, it is much easier to reduce inflammation now to boost your brainpower and avoid cognitive decline with age, but even if you are older or experiencing symptoms of dementia, it is still possible to improve your brain function. The sooner you start, the better, but it’s never too late to begin growing a younger, more powerful, and more energetic brain. You’ll learn how to do this later in this book.
CANCER
More than 40 percent of Americans are diagnosed with cancer in their lifetime.19 When mitochondria become dysfunctional and don’t produce energy efficiently—which, again, is typical of most people as they age—your risk of cancer increases. This is because an inflamed environment offers the perfect conditions for cancer cells to proliferate.
Think about a time you got a cut and the wound became swollen—an obvious sign of inflammation (an immune response) at work. When the body is injured, your cells multiply quickly so the wound can heal. That process alone does not cause cancer. But when cells multiply rapidly in an environment that contains excess free radicals—which damage the DNA of cells—the risk is that damaged or mutated cells will proliferate. If these damaged cells continue to reproduce, the result can be cancer.20
We often think that our risk of developing cancer is based mostly on our genetics, but the data shows that only about 2 to 5 percent of cancers are truly genetically based, and mitochondrial dysfunction causes most others. In 1931, a German biochemist named Otto Warburg won the Nobel Prize for discovering that highly dysfunctional mitochondria actually stop burning oxygen to make energy and turn instead to a much less efficient process called anaerobic metabolism, which is the combustion of carbohydrates in the absence of oxygen. Anaerobic metabolism is associated with the vast majority of cancers. But if your mitochondria are strong, they will not have to resort to anaerobic metabolism. This greatly reduces your cancer risk.
Cancer is something of a double-edged sword when it comes to anti-aging. Any time you do something that makes your cells grow faster or get younger, you are inherently increasing your cancer risk because cancer cells can potentially grow and rejuvenate along with the healthy ones. Then you end up with this weird dichotomy: You can grow old “normally” with a roughly 40 percent chance of getting cancer, or you can get younger and maybe as a result slightly increase your risk. My solution to this dilemma is to do everything I can to make sure my mitochondria run like superstars because that in and of itself will reduce my risk of cancer. I also take action to promote my body’s natural detoxification efforts.
In addition to apoptosis, which you read earlier is healthy, controlled cellular death that targets old or unstable cells, your body also has a built-in detox process to recycle damaged cellular components. This is called autophagy, a Greek word that translates as “self-eating.” During autophagy, your cells scan the body for pieces of dead, diseased, or worn-out cells, remove any useful components from these old cells, and then use the remaining molecules to either make energy or create parts for new cells. This recycling process removes unwanted toxins, reduces inflammation, and helps to slow the aging process.
When you activate autophagy, you slow down the aging process, reduce inflammation, reduce your cancer risk, and increase your body’s ability to function at its best. There are specific supplements and lifestyle modifications such as brief bouts of fasting that boost autophagy. You’ll learn how to do this as we get deeper into the techniques that make you Super Human.
SLASH YOUR RISK
Despite overwhelming evidence that mitochondrial dysfunction and the resulting inflammation leads to the Four Killers, we live in a society in which an inevitable decline in mitochondrial function is considered a normal part of aging. Of course we expect to die from one of these diseases! Between the ages of thirty and seventy, you experience a decrease in efficiency of the average mitochondrion by about 50 percent, setting the stage for you to develop these killers.
Since you’re reading this book, you obviously have no intention of aging like an average person, and you shouldn’t. By the time I discovered the importance of mitochondria, mine were already trashed from years of toxic mold exposure. The mold had weakened my system and aged me prematurely, so in many ways I was the canary in the coal mine. I felt the “cuts” that affect all of us much sooner than most people because I started off in a weaker spot. In order to get to a basic level of functionality, I had to find out what was causing these cuts and work on eliminating them.
Feeling the cuts so early and so deeply allowed me to experience real-time feedback and determine which environmental factors impacted my health and performance the most. This turned out to be an enormous gift because I was able to learn—and can now teach you—how to stop damaging your own body with thousands of invisible cuts by focusing on the basics: good nutrition, quality sleep, and a healthy environment free of toxins that cause more cuts.
Before we move on to learn how to do that, let’s take a closer look at exactly what these cuts do to our bodies. Obviously, you won’t go from eating an inflammatory meal to developing degenerative disease in one fell swoop. Instead, the cuts from your environment cause invisible damage on the subcellular level. This damage doesn’t age you at once, but it does so cumulatively, day after day, year after year. By the time you become aware of this damage, you’re old. But you can take action now to stop this damage before it stacks up. So after you take the steps to avoid the Four Killers, it’s time to focus on cheating death the way Super Humans do—by avoiding the Seven Pillars of Aging. These are the processes in your body that break as you age, and there’s a lot you can do to control them.
Bottom Line
If you are average …
• You have a 23 percent risk of dying from heart disease.
• You have a 25 percent risk of diabetes.
• You have a 10 percent risk of developing Alzheimer’s.
• You have a 40 percent risk of cancer and a 20 percent risk of dying from it.
So start hacking. Do these things right now:
• If you have joint pain or blood sugar issues, consider taking glucosamine, which helps control blood sugar and extends the life-span of mice (and probably humans).
• Consume more antioxidants to fight off free radicals. Berries, herbs, spices, coffee, tea, and dark chocolate are good sources. There are also medical spas in most cities that offer antioxidant therapy via IV. It may be worth looking into if you travel frequently or need an energy boost.
• Short periods of fasting stimulate autophagy. You’ll read more about the longevity benefits of fasting and how to do it without hunger later, but it’s worth starting now to benefit right away from increased autophagy.
• To help with cardiovascular issues, try the Zona Plus, a digitally controlled handheld device that uses the science behind isometric exercise to increase both vascular flexibility (thus decreasing blood pressure) and the production and flow of nitric oxide throughout the body, which is linked to treating various cardiovascular conditions, erectile dysfunction, and muscle fatigue. It’s a cool biohack for anyone who wants to improve their cardiovascular health.
• While it is most useful to look at how the environment will control your energy levels and your aging, it’s not like your DNA is meaningless. The area of functional genomics is just getting going. Like functional medicine, it is the study of what you can actually do to influence risk besides worry about it. For instance, a functional review of my genome from the DNA Company revealed that I should take extra steps to take care of the tight membranes in my arteries, including taking the supplements in this book. Check out their tests to discover your weaknesses and learn how to combat them.
