Food vs you: How your dinner controls you

 作者:明屠插     |      日期:2019-02-28 03:11:06
(Image: Spencer Wilson) By Mark Peplow How the trouble starts FOR those of us who would like to shed a few pounds, dietary advice usually boils down to brute arithmetic. Reduce energy input by eating less, and increase energy output by exercising more. Simple. Except that as anyone who has tried it knows, it isn’t. One reason is that our evolutionary history has given us a powerful drive to eat rich foods when they are available. Now that they are virtually ubiquitous, resisting temptation can be an endless losing battle. But there’s more to it than that. Treating food as simple units of energy – 100 calories in a chocolate-chip cookie, 1 calorie in a celery stick – may make diets easier to understand, but it is a recipe for failure. Food contains a lot more than just energy. It is stocked with powerful molecules that change how your metabolism works. The odds of meeting the infuriating demands of a calorie-controlled diet are seriously stacked against you. The idea that the “calories in, calories out” model is too simplistic has been gaining ground for years. Many other influences seem to play a role, from the bacteria that live in your gut to how the food is cooked. The latest findings concern the constituents of food itself. Our bodies have a finely tuned system that controls intake and determines how much we squirrel away in fat. It turns out that molecules within food can perturb this system. Some stimulate appetite and fat storage. Others do the opposite, turning on brain circuits that suppress appetite. As a consequence,