If you don’t have the mental strength to do it, you’re doomed to fail. End of the story.
However, the concept of willpower in diet has been the subject of much criticism. Researchers have long rejected the idea that there’s some innate force that will keep you from resisting bad habits1.
To attribute dieting success or failure just to willpower - researchers say - is a simplification that ignores details of the numerous mechanisms in play behind a successful weight loss program.
Believing that only willpower can do the magic trick entails a further risk. If you assume that it’s just a matter of mental strength, you can feel less in control of your eating habits and conclude that, if it’s not your DNA, there’s nothing you can do about it.
That’s not it though. The success of dieting is made by the sum of several behavioral changes. Willpower is one of them but it’s not the only one. There’s the interaction of brain chemicals, behavioral conditioning, hormones, heredity and the influence of habits. All these factors are part of the diet equation2.
