Wait . . . eggshells? Most people think of eggs as food, but very few people realize that egg shells have been used for medicinal purposes.
In fact, half of a teaspoon of the powder contains about 1,000 to 1,500 milligrams of calcium which equates to 90% of the daily recommended amount. Other minerals that are found in significant proportions in eggshells are zinc, iron, copper, manganese, phosphorus, fluorine, chlorine and molybdenum.