With sugar the new demon ingredient, and a public increasingly scrutinising what they’re putting into their bodies, major food and drink brands are scrambling to cater to the health-conscious consumer. Can Coca-Cola Zero Sugar prove that there’s still a space for fizzy drinks in the diet?

Portion sizes have grown over the last 50 years, along with the perception that bigger meals offer better value for money. Yet there is increasing evidence that people value brands that help them to be healthier, and when it comes to portion sizes, they can be persuaded that less is more.

With the impending sugar tax and increasing health concerns, it's not surprising that a third of people say they're actively reducing the amount of sugar in their diet. But consumers aren’t that clued up when it comes to the sweet stuff – most don’t understand the difference between sugar types.

In a move to tackle obesity, US schools will have to replace junk food with 'smart snacks' like granola bars and fruit cups in 2014-2015. But can deeply ingrained habits really be changed when a new study shows kids are less likely to choose foods they know are good for them?