Silver has been used for more than 2,400 years to help safeguard human health. It is a natural element that can be found in whole grains, edible and medicinal mushrooms, mammalian milk, spring water, sea water and tap water. From the time of Hippocrates, silver's health protective properties have been well-known and vastly researched. Silver was usedto help protect the purity and safety of dirnking water throughout ancient civilizations.