Keeping a healthy body weight is important for the heart and joints. Losing weight may also be important for healthy kidneys.

Before kidney transplantation, heavier patients are often told to lose weight to reduce the risk of complications. However, it's still unclear if some obese patients are too heavy to get a kidney transplant at all.

Whether you are old or young, being overweight or obese is not good for your health. If you are a teenager carrying too much extra weight, you may be in store for serious health problems as you grow older.

In many cases, type 2 diabetes can be prevented or reversed through a healthy diet and exercise. When lifestyle changes don't do the trick, obese patients can turn to weight loss surgery.

Obesity can lead to all sorts of health problems, from heart disease to diabetes. Now, it seems obesity can get in the away of kidney donation.

Some obese people take weight-loss drugs to help deal with their health problem. One of these drugs, orlistat, may be harmful.  The drug already carries a black box warning for liver damage, which the FDA added last year.