There is a lot of evidence that even the sugars naturally present in fruit are not good for you in large amounts either, e.g. in fruit juices. Oranges are best

There is a lot of evidence that even the sugars naturally present in fruit are not good for you in large amounts either, e.g. in fruit juices. Oranges are best consumed as oranges, not as orange juice, which contains all of the sugar and none of the good stuff like fiber. Also drinking a single glass of orange juice equates to eating a whole bunch of oranges at once, which just doesn't sound healthy.