Sugar tax

In an article to be published in the PLOS (Public Library of Science) Magazine, modelling by the university's Centre for Public Health Policy concludes that taxing foods that are high in sugar, salt and saturated fats — as well as subsidising fruit and vegetables — would also save $3.4 billion in healthcare costs.

"The study suggests that taxes and subsidies on foods and beverages can potentially be combined to achieve substantial improvements in population health and cost savings to the health sector," the article reads.

A new report from the body found that raising prices by 20% or more results in lower consumption and "improved nutrition".

The global health group has previously advised a lower sugar intake, but stopped short of backing tax measures.

Several countries, including Mexico and Hungary, already tax added sugar products.

South Africa is introducing a sugar tax next year. It's the only country in Africa to do so.