During the 33 years studied, global rates of being obese or overweight soared 28% in adults and 47% in children.
During that span, the number of overweight and obese people rose from 857 million in 1980 to 2.1 billion in 2013.
That number exceeds the total world population of 1927, when it first hit 2 billion.
Earth's population now tops 7 billion.
More top news
Selfless Donna Wood from Staffordshire has left her husband and children at home so she can help save lives in Sierra Leone.
From Sierra Leone to Cyprus, 8,500 Christmas boxes were sent out to every serviceman and woman from the UK.
Thousands of people have switched off their Christmas lights as a mark of respect for the victims of the Glasgow bin lorry tragedy.