Eggshell: An Alternative, Cheap, Bioavailable Source of Calcium in Human Diet

Abstract

Eggshell is a waste product of the food industry. It is an excellent source of bioavailable calcium. Animal studies suggested that eggshell is a natural source of bioavailable calcium. Microbiological studies indicated that the pathogenic microorganisms present in eggshell can be eliminated by proper processing, making it safe for human consumption. Human studies revealed that eggshell powder (ESP) has the potential to improve the bone mineral density and to favour the remineralisation of enamel surface lesion of teeth. It is effective to clear the urinary stones. Due to the presence of a little amount of strontium and other beneficial microminerals and a lesser amount of toxic substances, eggshell is a superior source of calcium than the oyster shell calcium. It may be used as an alternative source of calcium supplement. Regular use of little amount ESP added to our daily recipes may largely improve the calcium status of the individuals. Scientists conducted several studies on the utilization of eggshell powder in human nutrition. Calcium enriched bakery products (like cakes, bread, biscuits, etc.) and dairy products (like yoghurt, milk beverage, etc.) were prepared by a few researchers using different levels of ESP which showed that ESP can easily be utilized to increase the calcium content of processed foods. ESP can also be added to the daily diet of human beings. From the extensive review of literature, it is clear that eggshell is the best option among natural, cheap, bioavailable sources of calcium which are safe for human consumption.

Keywords: Eggshell powder (ESP), bioavailable calcium, bone mineral density, osteoporosis

Cite this Article
Sagarika Chakraborty, Santa Datta (De). Eggshell: An Alternative, Cheap, Bioavailable Source of Calcium in Human Diet. Research & Reviews: Journal of Dairy Science and Technology. 2019; 8(2): 25–33p.