Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Though obesity should be considered a disease on its own, it is also an important risk factor for many chronic physical and mental illnesses. For example, having a BMI of greater than 30 increases ones risk of heart failure by two and More than 85% of hypertension occurs in people with a BMI of greater than 25. Obesity is associated with cardiovascular diseases including angina and myocardial infarction, as well as many dermatological, endocrinological, gastrointestinal and neurological illnesses. Learn more about obesity as a risk factor for other diseases in this book.