Fruit juices made from superfoods such as cranberries and pomegranates are often considered to be a healthier option than fizzy drinks, but a study found that these juices of leading brands contain more sugar than soft drinks.
It was found that some cans of juices had almost twice the recommended daily sugar limit in a 300ml serving.
The Local Government Association has urged soft drink companies to drop the level of sugar in their products.
Studies show that children under the age of ten get one fifth of their sugar intake from soft drinks.
The Local Government Association, which represents councils in England and Wales, is responsible for public health.
LGA's Community Wellbeing Board chairman and councillor Izzi Seccombe was quoted by Gloucesterecho as saying: "It is wholly unacceptable for one normal-sized can of soft drink to contain double the recommended daily limit.
"Products like these are fuelling the obesity crisis and helping wean a generation of overweight children.
"We are calling on the sector as a whole to step up and show more corporate responsibility."
