Under certain conditions the body may have a positive water balance. In this case, there are more intakes of fluids than excretion of fluids. Such a condition is also called edema. The three main sources of water to the body are Fluid intake, Water contained in food, and Water formed by oxidization or metabolism of proteins, carbohydrates and lipids contained in foodstuffs in the body. There is also what is known as hard water and soft water.
Hard water is high in calcium and magnesium, while soft water is high in sodium.
The best way to replenish water is by drinking liquids. Caffeine and alcohol are not helpful towards restoring the water lost because they tend to act like diuretics and dehydrate the body by helping remove water from the body through urine. Fruit juices, sugar sweetened drinks cannot substitute for water as the sugar level in them is so high that it can actually hamper water absorption. But milk and decaffeinated drinks can be consumed as an alternate to pure water. If we consume a lot of salt, fiber or protein in our diet we must consume a greater amount of water.