04 Jul 2018 --- Four years after the introduction of Chile’s sugar tax, research claims that the levy has driven down the consumption of sugary drinks. And researchers believe that other countries could “take heart” from the findings because they show that the sugar tax incentive does not need to be high in order to have an impact. But there are doubts about its impact on socioeconomic inequalities in diet-related health, like obesity, leading to claims that it may be a “bittersweet success.”