It seems that being overweight contributes to every degenerative disease known to man. I exaggerate, of course, but here (from MSNBC) is news of a link between weight and the onset of Alzheimer's. Excess weight has recently been linked to increased risk of cancer, and we should all know about the strong link between weight and diabetes. If you are overweight, you should certainly be looking into losing it as the first step towards living a longer, healthier life. I recommend talking to your physician and investigating calorie restriction.