Obesity rates around the world doubled between 1980 and 2008.
This is according to research conducted by Imperial College London, Harvard School of Public Health and the World Health Organisation.
According to the results, more than 205 million men and 297 million women were considered obese in 2008.
The problem has also shifted in its geographical scale to no longer be an issue purely associated with rich Western countries.
Professor Majid Ezzati, an author of the report, commented: "Our results show that overweight and obesity, high blood pressure and high cholesterol are no longer Western problems or problems of wealthy nations.
"Their presence has shifted towards low and middle income countries, making them global problems."
Indeed, people in the Pacific Island nations, such as American Samoa, were found to be among the heaviest in the world.
Among developed countries, the US was home to the fattest population and Japan the slimmest.