Moderation is the key.
All fruits contain high levels of sucrose. Excess sucrose is stored as starch. Sucrose is extracted to
make table sugar. It doesn't matter if you get 1 gram from your apple
or 1 gram from your sugar bowl. The sugar from your apple does
increase your blood sugar. This is why diabetics are cautioned not to
eat fruits and vegetables (carrots, bananas, grapes...) with high
levels of sucrose. The benefit to eating fruit as opposed to just
table sugar is that fruits also conatin vitamins and starches that add
nutritional value.