The shell of an egg is such a common product that is readily discarded as useless. We don’t view it as anything beneficial to our household. Unfortunately, this is a common misconception because it is not only beneficial as a nutritionally dense food, but It can be used for several purposes. Hungarian physician Krompeher, with a group of medics and biologists, became interested in the healthy properties of eggshells. More than 10 years of research have shown that eggshells are the ideal source of bio-available calcium (dense and well absorbed).