It depends on what juice.
You must understand that horror stories like "there is so much sugar in Coca Cola that ..." are also true for fruit juices. In the most banal apple juice there are 10% "sugars", and drunk 200 grams of juice in general is a tangible "sugar blow" for which the body is not very ready. You can argue as much as you like about the fact that man "descended from a monkey" and so on, but the fact remains - modern man does not react very well to sugar. No, it's clear that from 200 grams of juice a day you won't die in a week, but the fact that a person who abuses sweets has a changed metabolism is a fact. You can get an overdose of vitamin C, for example, it is difficult, but possible. You can overdo it with fruit drinks, lingonberry, and this will not be very good, especially if you have kidney problems. As for fruit juices. Vegetable juices are generally less "harsh", but daily consumption of carrot juice can affect the complexion. In general, know when to stop and live calmly, without fanaticism.