When the proper consumption of fructose or hepatic glycogen is insufficient, the potential health benefit of fructose relative to glucose is that it will not cause the rise and fall of blood sugar level. Too much fructose is harmful to human body, far more harmful than glucose. I'm not sure why galactose (a lactose or monosaccharide in lactose) has less negative effects on health than fructose, because my understanding is that galactose is metabolized in a similar way, but this is another problem.
When natural sugars (fructose, sucrose and glucose) in fruits are consumed as a part of the whole unprocessed fruit (including the peel, which is not juiced), these sugars are harmless. This is because nature, with its infinite wisdom, contains all the benefits combined with the sweetness of fruit-water, fiber and various vitamins, minerals and flavonoids. These nutrients work together to prevent the sugar in the fruit from being absorbed into the blood too quickly.
When sugar is absorbed slowly, blood sugar will not rise. The behavior of refined sugar found in processed food is quite different, because all the sugar added in refined food will be quickly absorbed into the blood, leading to a sudden increase in blood sugar, which is the reason for increasing insulin sensitivity and increasing the risk of diabetes, heart disease, cancer and obesity for a long time.
Because of all the water, fiber and other nutrients, the whole fruit (for this matter, any whole food) provides more satiety than refined processed food-it is this satiety and satiety that makes overeating in fruit completely impossible. They are intact, untreated forms, and cause harm. Fruit is really healthy.
However, if fructose is separated and added to processed food as a sweetener, its behavior will cause blood sugar fluctuation, addiction and craving, just like refined sugar. This is because synergistic nutrition is omitted when fructose is separated. Fruit juice and dried fruit are not whole foods, that is, they have been changed in some way, so they are not as healthy as whole fruits. Even without sugar, juice is usually filtered to remove fiber, and natural sugar is often concentrated in the process of juicing. Similarly, because of the removal of water, dried fruits will also concentrate sugar.