Although grape juice needs to ferment until it becomes wine, there are a number of overlapping nutrients and compounds contained in grape juice and alcohol that makes it a perfect substitute for alcoholic beverages. When you are trying to kick the habit and move past a period of alcoholism, grape juice may be your best bet. The tannins and other phytochemicals present in grape juice will also help your body improve its immune strength and detoxification efficiency. Furthermore, grape juice is widely available and relatively inexpensive in most parts of the world.