but dietitian karen fisher says juice is even worse. she calls it "liquid diabetes" and says one glass of orange juice has the sugar equivalent of three whole oranges. >> a lot of foods we don't think of as sweet have the added sugars. >> reporter: and not all sugars are created equal. >> added sugars, just a pure simple sugar, don't need any digestion. they will enter right into our bloodstream. leave us feeling hungry and eating them can lead us to craving more sweets. >> it is the added sugar, not the sugar in a piece of fruit we will crave. it is the sugar in a piece of candy or a sweetened ice tea we will crave. >> reporter: but how do you tell if the sugar you are eating is processed? >> there is not a lot of the label that talks about sugar. >> reporter: the fda proposing new labels that would add a line for added sugars but for now, they only list how many grams are in food products. so we are going to head inside and see how much sugar the food products in your local grocery store aisles have in them. keep in mind, the world he