Most of the juices that can be found in the shop are sugar bombs melted in water with very little to do with the fruits. Unfortunately, they contain only a few of the valuable nutrients that we can find in fruits. Instead, they offer taste regulators that are supposed to improve flavor and are unlikely to be healthy. Sadly, it’s a kind of junk food.
It is better to squeeze out juices or eat fresh fruits. Naturally, real juice can be bought (but it’s much more expensive). Still, in this case, it is always worth checking the ingredients in the container.