Weight Loss

There are dozens of well-known diet plans to choose from these days, and many of them focus on familiar themes. Dieters use commercial programs from Weight Watchers to Slim-Fast to lose weight. Learn more.

By Betsy Hornick

I've read your article on dieting, but there's one thing in it I don't understand. It says, "Once you end a diet, you gain all the weight back very quickly." Why is that? Why does the weight come back so quickly?

Calories -- people are constantly counting them and cutting them. At any given time, millions of people are trying to slim down. Learn all about calories and exactly how (and why) they affect your weight.

By Julia Layton

The number on the scale alone can't tell you whether you're at a healthy weight. Because height is also a factor, scientists came up with a mathematical formula called Body Mass Index (BMI). Learn how to calculate your BMI.

By Stephanie Wilson

Dieting is a multibillion dollar industry in the United States, but it doesn't work for most people. The story tends to stay the same -- lose 20 pounds, gain back 30. But there are healthy, effective ways to lose weight. Find out why most diets fail and what you can do to make yours work.

By Marshall Brain

About 65 percent of Americans are either obese or overweight, and the CDC has classified obesity as an epidemic, yet recent studies have shown that obese people with chronic diseases have a better chance of survival than normal-weight individuals do.

By Craig Freudenrich, Ph.D.

A sensible diet and regular exercise are essential components of any successful weight loss plan. Learn helpful tips for cutting calories, making smarter food choices, and increasing your physical activity to help you lose weight.

By Gayle A. Alleman