Obesity is commonplace. More than 42 percent of Americans are obese. The rate of obesity has gone up by 12 percentage points over the last 20 years. One reason why is that there are many causes of obesity. Yet very few people understand what causes obesity and why. What are genetic and biological reasons for obesity? What about the American lifestyle lends itself to weight gain? What ingredients and medications should you avoid? Answer these questions, and you can become an

A slow metabolism might not be the only reason you’re having a hard time losing weight. You read that right. Metabolism plays a role but...