Obesity and overweight have in the last decade become a global problem - according to the World Health Organization (WHO) back in 2005 approximately 1.6 billion adults over the of age 15+ were overweight, at least 400 million adults were obese and at least 20 million children under the age of 5 years were overweight.

Experts believe if the current trends continue by 2015 approximately 2.3 billion adults will be overweight and more than 700 million will be obese. The scale of the obesity problem has a number of serious consequences for individuals and government health systems.

These conditions can cause or contribute to premature death and substantial disability.

Cardiovascular disease - mainly heart disease and stroke - is already the world's number one cause of death, killing 17 million people each year and diabetes has rapidly become a global epidemic - according to WHO projections diabetes deaths will increase by more than 50% worldwide in the next 10 years.