Health Risks of ObesityThe more obese a person is, the more likely he or she is to develop Health problems. Mild obesity involving a body mass index (BMI) of 30+, is less dangerous to health than morbid obesity (BMI 40+) or malignant obesity (BMI 50+). For example, someone who is 40 percent overweight is twice as likely to die prematurely as an average-weight person. This effect is seen after 10