InfoAging reminds us that excess weight - in the form of abdominal fat deep within the body - is bad for our long term health and longevity. "Scientists have known for decades that people with too much abdominal fat are more prone to diabetes and heart disease. Only in recent years have they found the reason - abdominal fat produces at least 10 hormones that affect the body's metabolism." In effect, weight gain produces an extra "unofficial" organ - one that is working to damage your health and reduce your healthy life span. As practitioners of calorie restriction already know, maintaining a low normal BMI with good diet and lifestyle choices will keep you healthier for longer.