Is the obesity crisis hiding a bigger problem? Asks Peter Attia at this TED talk presentation: What if we’re wrong about diabetes?
Listen to the MP3 Audio: Peter Attia- What if we’re wrong about diabetes-
I’ll never forget that day back in the spring of 2006.
I was a surgical resident at The Johns Hopkins Hospital, taking emergency call. I got paged by the ER around 2 in the morning to come and see a woman with a diabetic ulcer on her foot. I can still remember sort of that smell of rotting flesh as I pulled the curtain back to see her. And everybody there agreed this woman was very sick and she needed to be in the hospital. That wasn’t being asked. The question that was being asked of me was a different one, which was, did she also need an amputation?
Now, looking back on that night, I’d love so desperately to believe that I treated that woman on that night with the same empathy and compassion I’d shown the 27-year-old newlywed who came to the ER three nights earlier with lower back pain that turned out to be advanced pancreatic cancer. In her case, I knew there was nothing I could do that was actually going to save her life. The cancer was too advanced. But I was committed to making sure that I could do anything possible to make her stay more comfortable. I brought her a warm blanket and a cup of coffee. I brought some for her parents.
But more importantly, see, I passed no judgment on her, because obviously she had done nothing to bring this on herself. So why was it that just a few nights later, as I stood in that same ER and determined that my diabetic patient did indeed need an amputation, why did I hold her in such bitter contempt?
You see, unlike the woman the night before, this woman had type 2 diabetes. She was fat. And we all know that’s from eating too much and not exercising enough, right? I mean, how hard can it be?
As I looked down at her in the bed, I thought to myself, if you just tried caring even a little bit, you wouldn’t be in this situation at this moment with some doctor you’ve never met about to amputate your foot.
Why did I feel justified in judging her? I’d like to say I don’t know. But I actually do. You see, in the hubris of my youth, I thought I had her all figured out. She ate too much. She got unlucky. She got diabetes. Case closed.
Ironically, at that time in my life, I was also doing cancer research, immune-based therapies for melanoma, to be specific, and in that world I was actually taught to question everything, to challenge all assumptions and hold them to the highest possible scientific standards.
Yet when it came to a disease like diabetes that kills Americans eight times more frequently than melanoma, I never once questioned the conventional wisdom. I actually just assumed the pathologic sequence of events was settled science.
Three years later, I found out how wrong I was. But this time, I was the patient. Despite exercising three or four hours every single day, and following the food pyramid to the letter, I’d gained a lot of weight and developed something called metabolic syndrome. Some of you may have heard of this. I had become insulin-resistant.
You can think of insulin as this master hormone that controls what our body does with the foods we eat, whether we burn it or store it. This is called fuel partitioning in the lingo. Now failure to produce enough insulin is incompatible with life. And insulin resistance, as its name suggests, is when your cells get increasingly resistant to the effect of insulin trying to do its job.
Once you’re insulin-resistant, you’re on your way to getting diabetes, which is what happens when your pancreas can’t keep up with the resistance and make enough insulin. Now your blood sugar levels start to rise, and an entire cascade of pathologic events sort of spirals out of control that can lead to heart disease, cancer, even Alzheimer’s disease, and amputations, just like that woman a few years earlier.
With that scare, I got busy changing my diet radically, adding and subtracting things most of you would find almost assuredly shocking. I did this and lost 40 pounds, weirdly while exercising less. I, as you can see, I guess I’m not overweight anymore. More importantly, I don’t have insulin resistance.
But most important, I was left with these three burning questions that wouldn’t go away: How did this happen to me if I was supposedly doing everything right? If the conventional wisdom about nutrition had failed me, was it possible it was failing someone else? And underlying these questions, I became almost maniacally obsessed in trying to understand the real relationship between obesity and insulin resistance.
Now, most researchers believe obesity is the cause of insulin resistance. Logically, then, if you want to treat insulin resistance, you get people to lose weight, right? You treat the obesity. But what if we have it backwards? What if obesity isn’t the cause of insulin resistance at all? In fact, what if it’s a symptom of a much deeper problem, the tip of a proverbial iceberg?
I know it sounds crazy because we’re obviously in the midst of an obesity epidemic, but hear me out. What if obesity is a coping mechanism for a far more sinister problem going on underneath the cell? I’m not suggesting that obesity is benign, but what I am suggesting is it may be the lesser of two metabolic evils.
You can think of insulin resistance as the reduced capacity of ourselves to partition fuel, as I alluded to a moment ago, taking those calories that we take in and burning some appropriately and storing some appropriately. When we become insulin-resistant, the homeostasis in that balance deviates from this state. So now, when insulin says to a cell, I want you to burn more energy than the cell considers safe, the cell, in effect, says, “No thanks, I’d actually rather store this energy.” And because fat cells are actually missing most of the complex cellular machinery found in other cells, it’s probably the safest place to store it.
So for many of us, about 75 million Americans, the appropriate response to insulin resistance may actually be to store it as fat, not the reverse, getting insulin resistance in response to getting fat. This is a really subtle distinction, but the implication could be profound.
Consider the following analogy: Think of the bruise you get on your shin when you inadvertently bang your leg into the coffee table. Sure, the bruise hurts like hell, and you almost certainly don’t like the discolored look, but we all know the bruise per se is not the problem. In fact, it’s the opposite. It’s a healthy response to the trauma, all of those immune cells rushing to the site of the injury to salvage cellular debris and prevent the spread of infection to elsewhere in the body.
Now, imagine we thought bruises were the problem, and we evolved a giant medical establishment and a culture around treating bruises: masking creams, painkillers, you name it, all the while ignoring the fact that people are still banging their shins into coffee tables. How much better would we be if we treated the cause — telling people to pay attention when they walk through the living room — rather than the effect? Getting the cause and the effect right makes all the difference in the world. Getting it wrong, and the pharmaceutical industry can still do very well for its shareholders but nothing improves for the people with bruised shins. Cause and effect.