Well if there was any doubt left on the impact of a tax on sugary drinks sales, a new study has settled it once and for all.
Commissioned by the World Health Organisation, an extensive review of policies from around the world who have enacted taxes on the sweet stuff found they're linked to a 15 percent drop in sales on average.
More than 45 countries have taxed sugary drinks, but New Zealand is not one of them. Anna speaks to Dr Rob Beaglehole about what he hopes will happen next.
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