The effect on soft drink on plant growth?

There are many folk-cures and hear-say remedies for growing plants, many if not most will end in weakening if not killing the plant, the best recourse is to know the plant, know what type of soil it likes, and what kind of nutrients it requires, (well balanced nutrient filled diet) the simple course of action would be: Plain water, Air, Sunlight [full/partial/defused] and a mild form of fertilizer, keeping in mind not to over water or under water.