Modern science has proved that silver is a natural and permanent bactericide, and silver ions dissolved in water will adsorb bacteria on it, making its colloid converge and solidify until death. As long as there is 50 billionth of a gram of silver ion in a liter of water, it is enough to make bacteria unable to survive. Drinking water in a silver pot can last for several months without corruption. The ancient Egyptians knew to cover wounds with silver more than 2000 years ago to sterilize and prevent suppuration. Silver ion can not only kill more than 60 kinds of harmful bacteria such as Escherichia coli and typhoid Bacillus, but also promote detoxification and health preservation, accelerate metabolism and enhance resistance to diseases. Long-term use of pure silver products can enhance energy and prolong life.