Earlier this week, long-time eating researcher Traci Mann and I discussed the unbecoming truth about diets. The takeaway is that they don't actually work. Over the course of her more than 20 years studying how people eat, Mann has found that willpower doesn't work quite like we imagine it will, and our bodies are predisposed to maintain a weight that often doesn't fit the ideal mold we aspire to achieve.

That being said, there is more than mere gloom for those hoping to shed a few pounds, or even just eat a bit more healthfully. Diets might not work the way we want them to, but there are at least two strategies for eating less unhealthy food and more healthy food that have been shown to work pretty well.

"The whole second half of my book [Secrets from the Eating Lab] actually talks about strategies for eating and losing weight that don't require will power," said Mann, who conducted much of her research at the University of Minnesota's Health and Eating Lab. "There are strategies that are easier to do without going on a diet that is ultimately going to fail.

In our conversation, she reveals those strategies and explains why they are so effective:

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1. Focus on creating obstacles to eating bad food

These are strategies that put obstacles between you and tempting food. The reason obstacles work is because we are lazy. An obstacle will slow us down, if not stop us entirely. So it's a great strategy for eating less of something. It's not going to help you eat none, but you will likely eat less of it.

There's this one study from my colleagues' eating lab in the Netherlands where she showed that if you have a bowl of M&Ms on the table next to you you'll eat a lot of them. If you move it across the room, however, you'll eat roughly half as many. Now, that's a big obstacle. You've got to stop what you're doing and get up and walk across the room. But even a smaller obstacle than that - a much smaller one in fact - will work just as well. If you just move that bowl of candy two feet across the table, so it's still on the table but you have to extend your arm to reach it, you'll eat as few as when it's across the room.

So even the smallest of obstacles slow you down. Is it going to get you to eat no M&Ms? No. But I don't think the goal should be to eat zero M&Ms. The goal should be to not eat as many. You need to live your life, so you should get to have a little candy.

2. Make it easier to eat healthy food

The other strategy kind of flips it. Instead of making it harder to eat unhealthy stuff, they make it easier to eat healthy stuff.

An example of that would be the "get alone with a vegetable" strategy. The strategy is that you put vegetables in competitions that they can win. Normally, vegetables will lose the competition that they're normally in - the competition with all the other delicious food on your plate. Vegetables might not lose that battle for everyone, but they do for most of us.

This strategy puts vegetables in a competition they can win, by pitting vegetables against no food at all. To do that, you just eat your vegetable first, before any of the other food is there. Eat them before other food is on your plate, or even at your table. And that way, you get them when you're hungriest and unable to pick something else instead.

We've actually tested this in a lot of ways. And it works unbelievably well. We tested it with kids in school cafeterias, where it more than quadrupled the amount of vegetables eaten. I tested it with the students in my class last fall. Not only did it increase the amount of vegetables they ate, but it decreased the amount of calories they ate without trying to.

The strategies are kind of like this. And they work. It's not about resisting yummy stuff. It's not about going on a diet that is bound to fail. It's just about making it a little harder to make the wrong choices, and a little easier to make the right ones.