Almost every country in the world now has serious nutrition problems due either to obesity or to a lack of food, according to a major study published on Saturday.

Researchers behind the Global Nutrition Report, which looked at 140 countries, said the problems are "putting the brakes on human development as a whole" and called for a critical change in the response to this global health threat.

The report found that while malnutrition rates are falling globally, their rate of decrease is not fast enough to meet the internationally agreed-on Sustainable Development Goal (SDG) to end all forms of malnutrition by 2030.