Compared to fruits, fruit juices are unhealthy as they are devoid of the fruit’s fiber. Fruit’s fibrous content slows down absorption of its fructose in bloodstream, preventing unnecessary spikes in our insulin. As juice doesn’t have fiber, it results in fast absorption of the juice’s fructose, causing sudden spikes in insulin. Overtime, this can lead to Type 2 Diabetes.
Now, one glass of orange juice contains at least 8 oranges. Instead of drinking juice, if we decide to eat oranges, it isn’t possible to eat more than 2 or 3. Thus, we consume more calories. Also, our brain doesn’t get the same feeling of fullness on drinking, that it gets on eating. We feel hungrier sooner, thus leading to over-consumption.
Note that, packaged fruit juices are definitely unhealthy as they are prepared by keeping fresh fruit juices in oxygen-depleted environments for a year and chemicals are also added to enhance their flavor.