Growing trend predicted that in next 10 years , 20% of adults will be obese.

In last 40 years, worldwide the number of obese adults unprecedentedly increased to about 640 million — whereas in 1975 these numbers were only 105 million.

This continues up trend predicted that by year 2025,means in next 10 years of time, 20% of the adults population of the world will be obese. The rate of being obese is triple in men and twice in women , according to a studies published in Lancet .

It’s an alarming situation as its not only placing a huge number of population under threat but also exerting an immense pressure on resources in terms of health care and treatment costs.

Obesity nurtures the risk of diabetes, heart disease and other chronic conditions, and countries all over the world are combating with hit the roof health costs.

Behind the global spike is greater access to cheap food. “It has been very easy, as countries get out of poverty, to eat a lot, and to eat a lot of unhealthy calories,” said Majid Ezzati, the study’s senior author and chair of global environmental health at Imperial College London.

The price of fresh fruits, vegetables and whole grains are often “noticeably more than highly processed carbohydrates,” he said.

A person who has a body-mass index higher than 30, or weighs at least 203 pounds and is five-foot-nine, is considered obese. The world population’s average weight has increased by about 3.3 pounds per decade since 1975, the researchers estimate.

Ezzati and hundreds of colleagues from around the world gathered data from surveys that measured the height and weight of 19 million adults. They then used statistical

For women, this transformation took place many years ago. Obese women have outnumbered those who are underweight for more than a decade. For men, being underweight was a bigger problem until about 2011. Adults are considered underweight if their BMI is below 18.5, or weighing less than 125 pounds for someone who is five-foot-nine. In 1975, more than twice as many people were underweight than obese.

Ezzati said the trends are related. “The issue really comes down to people either not having enough to eat or not having enough healthy food to eat,” he said. “It becomes a manifestation of the same problem.”

No government has found a way to stop rising obesity, though some are trying. Mexico, with almost two-thirds of its population overweight or obese, enacted a national tax on sugary beverages in 2014.

The analysis also estimates an alarming rise of extreme cases of obesity. The global rate of severe obesity, or BMI over 35, is on pace to surpass nine per cent in women and six per cent in men by 2025. That category now includes 39 million adults in the U.S. In 1975, it was four million.