The real issue with fruit juice is that you can easily consume the juice of several pieces of fruit all at once and in a form that makes the sugar rapidly avail

The real issue with fruit juice is that you can easily consume the juice of several pieces of fruit all at once and in a form that makes the sugar rapidly available so you get insulin spikes. The serving size for children of juice is 4-6oz which isn't very much volume, so its super easy to over do it. If you eat the whole fruit that sugar s bound up with fiber so you don't consume as much as easily and you digest it more slowly. Fiber plays a key role in satiety (feeling full) and stripped of fiber its easy to consume too many calories. A whole orange contains 3-6x the fiber of the equivalent volume of orange juice with pulp.