Some people believe that pure water is too pure to contain any nutrients, but they fail to realize that 95% of the nutrients our bodies need come from food. If it's not pure, then what qualifies it as pure water? Generally speaking, the main forms of impurities in water are gases, liquid droplets, suspended particles in water, solid particles, and microorganisms, and their concentrations change with factors such as discharge volume, human traffic, and climate. With so many pollutants, can they simply be treated superficially and made safe for drinking? Mineral water, which is only superficially filtered, retains not only minerals and nutrients but also harmful substances. Among these harmful substances, there are often carcinogens that have no threshold effect; even in small amounts, they can produce certain reactions.