This "double burden of malnutrition", or DBM, affects more than a third of some 130 countries classed as low-and middle-income, the report in the medical journal said.
French survey of more than 100,000 adults finds a 100 ml increase per day of sugary drinks is associated with an 18 percent increased risk of cancer.
The United Nations agency, issuing its first such guidelines, said under-fives should also be physically active and get adequate sleep to help develop good lifelong habits and prevent obesity and other diseases in later life.
Followers have been showering monks – who are deeply respected in the kingdom – with foods loaded with sugar, fat and oil, prodding along a brewing health crisis.
With richer nations enjoying an increasingly comfortable, sedentary lifestyle, the study says a third of women and a quarter of men worldwide are in the firing line for killer conditions unless they up their physical activity.
If current trends continue, 22 percent of people in the world will be obese by 2045, up from 14 percent last year, according to research presented at the European Congress on Obesity in Vienna.
Junk food adverts are to be banned from London’s tube and bus network by Sadiq Khan, the city’s mayor, in an attempt to curb an epidemic of childhood obesity.
An Australian consumer body took Heinz to court in 2016 over packaging claims that Shredz products, which contain fruit pastes, purees and concentrate, are healthy and nutritious for young children.
Officials say US President Donald Trump scored "exceedingly well" in an exam designed to detect signs of memory loss. The test comes after a new book painted Trump as a man-child with trouble in processing information and recognising old friends.
In Mexico, seven out of 10 children between the ages of four and 16 are classified as overweight, and half of those as obese.
Obesity has increased more than tenfold over the past four decades worldwide. Researchers say social inequality urges people to make unhealthy choices as healthy food is unaffordable.
A new study by the International Agency for Research on Cancer has found evidence of deadly proportions - obesity could lead to 11 different forms of cancer.
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