Think twice before supersizing that meal. According to a new study in the Frontiers of Public Health, an estimated 70% of people in the world’s 30 most-developed countries are “overfat.” Rather than using body mass index, overfat actually measures a person’s body fat. However it’s measured–obesity, overweight or overfat–excess fat has direct links to a host of other health conditions, including diabetes, heart disease, stroke and more. Download the PDF.