How about this for scary ?
If an individual is 3 stone overweight this is what they can expect. They are:

• Thirteen times more likely to get Type 2 diabetes
• Four times more likely to have high blood pressure
• Three times more likely to have a heart attack
• At greater risk of osteoarthritis, because of the extra weight on the joints
• More susceptible to gallbladder disease and gallstones due to their raised cholesterol
• At greater risk of developing several types of cancer
• More likely to suffer sleep apnoea and asthma

Source: The World Cancer Research Fund