The calorie restriction diet myth suggests you will win the fight against flab. While losing weight does come down to how many calories you consume, it’s the types of foods you eat that will determine how you feel as you lose weight and the kind of weight you will lose. If you have a poorquality diet — counting calories but eating junk food — chances are you’ll lose muscle rather than fat, and thus, suffer from slow metabolism.
Sure, you can lose weight quickly. There are plenty of fad diets that work to shed pounds rapidly -- while leaving you feeling hungry and deprived. But what good is losing weight only to regain it? To keep pounds off permanently, it's best to lose weight slowly. And many experts say you can do that without going on a "diet." Instead, the key is making simple tweaks to your lifestyle.