Well, also being overweight increases your cholesterol levels. If someone slightly overweight lost 10 lbs, they would see their cholesterol level as well as their risk for diabetes drop. Obesity is a risk factor in developing these conditions. The best thing you can do for yourself is stay lean. I'm 5'8", 125 lbs, and I dont always eat well, but I exercise like crazy to ensure I'm healthy. Losing FAT (not muscle) will help you be healthier and also you can cheat once in a while in terms of eating and it's not so bad