If you use a genuine juicer to make juice, you can just put the fruit in directly without adding water. The fruit itself is rich in water and cool in nature, which can satisfy the normal operation of the machine.
But if you use mixing to extract juice, you need to add the right amount of water, because it is difficult to add water to the mixer to work properly. In addition, juice with or without water, you need to decide according to your own taste. If you like to drink thick, don't add water. If you like to drink light, you can add the right amount of water when juicing.