Fruit contains a natural sugar called fructose. Unlike sucrose, or table sugar, fructose does not cause abrupt fluctuations in your blood sugar levels because your body digests it more slowly than sucrose. Diabetics are often advised to use fructose as an energy source because it may aid glycemic control. Fruits that taste sweeter, such as cherries or peaches, generally have more natural sugar in them, while more tart fruits, including lemons or avocados, have less, but few fruits contain enough sugar to make them bad for you.
Fruits are loaded with fiber, water and have significant chewing resistance.
For this reason, most fruits take a while to eat and digest, meaning that the fructose hits the liver slowly.
Plus, fruit is incredibly fulfilling. Most people will feel satisfied after one large apple, which contains 23 grams of sugar, 13 of which are fructose
A single apple would make you feel quite full, automatically making you eat less of other foods.
When fructose hits your liver fast and in large amounts then that can have disastrous consequences, but when it hits your liver slowly and in small amounts then your body can easily take care of the fructose.
The main reasons to avoid fruit include some sort of intolerance, or being on a very low-carb / ketogenic diet.
Fruit is high in the simple sugar fructose, which is the main reason why many people trying to lose weight remove it from their diet. Unlike glucose the most common simple sugar that’s sent to your muscles, brain, and other organs for them to use as energy fructose is only processed by your liver. If your liver already has ample energy, there is a higher likelihood that your liver will repackage the excess fructose as fat.