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by ajb
897 days ago
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With obesity there is a constant refrain that people should be able to deal with it by willpower alone. Here is an analogy to explain why this is unrealistic: A while back I had a massive immune reaction in my skin, which brought with it the constant urge to scratch. A lot of people idly comment that the solution is to just not scratch, but it turned out that I had a skin infection, and under those circumstances the instinct to scratch is incredibly strong; you do it as soon as your mental attention is turned elsewhere. Once the skin infection was cured, and a bit of steroid cream applied the urge to scratch went away. Now imagine how strong is the instinct to eat. Eating is essential for life, the instinct to eat when hungry has been reinforced by evolution constantly since the nervous system developed. Have you read a description of what it's like to starve? The brain can think of nothing but eating, peoples behaviour becomes quite extreme. Some people do overcome it - those who starve themselves to try to save their children, for example. But that's an enormous external motivation. There's a bit of cognitive dissonance in seeing a hugely fat person and trying to imagine that their nervous system is for some reason acting like they are starving. It's a lot easier to imagine that they just don't have the willpower to resist that extra snack, which is a situation a lot more familiar to most of us. But it seems likely that the further is more correct. |
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I am inclined to believe that the root cause for the obesity epidemic is our satiety signals being out of whack. In which case "just eat less" is about as useful piece of advice as "just breathe less". In both cases you would be struggling against enormously strong, primordial bodily mechanisms.