Why diets don't work

Dieting is big business. Over the air and through massive magazine ad campaigns come promises of quick, safe and guaranteed weight loss - for a fee. Although most diet programs don't keep accurate information on their results, informal surveys have revealed that very few dieters will have maintained their weight loss at the end of one year. The people who benefit most from these diets are those who sell them.

There are several reasons why such dieting doesn't work. First, the diets are usually boring and unnatural, especially if they involve special diet foods or eating schedules rather than a permanent, healthy change in eating habits. Most people go back to their old eating habits once they "finish" the fad diet.

Second, dieting without exercise often lowers the body's metabolism. The body shifts into starvation mode and cuts back its calorie needs in order to survive. The starvation mode can last for months after the diet is ended, causing weight gain on fewer calories than before.

Third, weight gain after dieting can increase the percentage of fat in the body. Quick weight loss removes both fat and muscle tissue from the body. When the weight is regained, as it usually is, it comes back in the form of fat. Every subsequent diet then takes away muscle and fat and returns only fat. This pattern of frequent dieting and weight gain, called "yo-yo dieting," puts a strain on the heart, as well as on the dieter's morale and motivation.

Studies show that choosing healthy eating habits, starting and maintaining an exercise program, and losing weight gradually are the most effective ways of reducing your weight permanently.

Before you diet, consult your doctor or nutritionist to help you come up with a weight-loss program that really works, particularly if you're over 40 or suffer from a chronic physical condition. Once you commit to these basic principles, you can forget fad diets and start enjoying the benefits of healthy - and permanent - weight loss.

Dr. Wendy has her Master's Degree in Nutrition. For questions, email her at haydenhealth@gmail.com.