Contains large amounts of dissolved minerals such as calcium, sodium, magnesium, and iron. Some tap waters contain as many or more minerals than some commercial mineral waters. There is no scientific evidence that either high or low mineral content water is beneficial to humans. The importance of mineral water lies in the fact that it provides minerals to humans that they can not produce themselves. However, some mineral water contains elevated levels of minerals such as sodium, which is detrimental to the human body, specifically those with high blood pressure.