In the course of the past forty-odd years, Americans have gotten a lot of advice about how to lose weight and eat healthier. First we needed to reduce fat, then cholesterol, then saturated fat, then sodium, then carbs, and now trans fats. Yet despite all this, the number of ballooning Americans is still ballooning.
Here’s what I think the problem is. All the advice that we get is good advice when it’s given, but quickly becomes bad advice because the food companies respond to it.
For example, let’s take the advice to reduce fat. Back in the 60’s and earlier, reducing fat was a good idea. That’s because most of the available low-fat food, such as fruits, vegetables, fish, and whole grains, was actually healthy. And most of the available high-fast food, such as red meat, eggs, and cheese, was actually unhealthy.
But once the word went out that people should reduce their fat intake, the food companies responded by churning out junk food that was “low fat”. The low fat junk food wasn’t actually healthier than the original versions of the same products, so now it was possible to eat a low fat diet that was unhealthy. Unfortunately, dietary advice never really changed to reflect that fact.
And the same process repeated for everything else. The food companies made junk food that was low cholesterol, low sodium, low sugar, and so forth. But none of these products were healthy. They were merely piggy-backing on the public perception of low cholesterol, low sodium, low sugar products as healthy.