Globally, about one in nine adults have diabetes, and the disease will be the seventh leading cause of death by 2030
Researchers who analysed data of 1,153 people aged 18-69 years found those who ate 100g of chocolate a day had reduced insulin resistance and improved liver enzymes
A major new report by WHO has warned that diabetes cases have risen to 422 million in 2014 from 108 million in 1980