Dieting triggers bulimia’s destructive cycle of binging and purging. The irony is that the more strict and rigid the diet, the more likely it is that you’ll become preoccupied, even obsessed, with food. When you starve yourself, your body responds with powerful cravings—its way of asking for needed nutrition.
As the tension, hunger, and feelings of deprivation build, the compulsion to eat becomes too powerful to resist: a “forbidden” food is eaten; a dietary rule is broken. With an all-or-nothing mindset, you feel any diet slip-up is a total failure. After having a bite of ice cream, you might think, “I’ve already blown It, so I might as well go all out.”
Unfortunately, the relief that binging brings is extremely short-lived. Soon after, guilt and self-loathing set in. And so you purge to make up for binging and regain control.
Unfortunately, purging only reinforces binge eating. Though you may tell yourself, as you launch into a new diet, that this is the last time, in the back of your mind there’s a voice telling you that you can always throw up or use laxatives if you lose control again. What you may not realize is that purging doesn’t come close to wiping the slate clean after a binge.
Purging does NOT prevent weight gain
Purging isn’t effective at getting rid of calories, which is why most people suffering with bulimia end up gaining weight over time. Vomiting immediately after eating will only eliminate 50% of the calories consumed at best—and usually much less. This is because calorie absorption begins the moment you put food in the mouth. Laxatives and diuretics are even less effective. Laxatives get rid of only 10% of the calories eaten, and diuretics do nothing at all. You may weigh less after taking them, but that lower number on the scale is due to water loss, not true weight loss.