Generally speaking, there is no need to add water to fruit juice. Fruit itself contains water, and the water squeezed by juicer can fully meet the needs of human body. 2. However, juicing with a blender requires water, and dry burning will damage the blender. Generally speaking, not all fruits need water, only some fruits with heavy taste need water. Generally, healthy people don't need water to drink freshly squeezed juice, but they can't drink it directly for babies or the elderly. Their digestive ability and spleen and stomach are weak, and drinking high-purity freshly squeezed juice will increase the burden on their digestive organs.