Comparative study on calcium content in egg shells of different birds
Shwetha A, Dhananjaya, Shravana Kumara SM, Ananda
This study was designed to evaluate the calcium carbonate in different birds’ eggshell because it has a potential application in the development of a new option of pharmaceutical excipient. Egg shells are the rich source of mineral salts, mainly calcium carbonate, which is probably the best natural source of calcium and it is about 90% absorbable. The composition of the egg shell is approximately 98.2, 0.9, 0.9% Calcium carbonate, Magnesium and Phosphorous (phosphate) respectively. Discarded eggshells are often used as a plant fertilizer and are effective liming sources. This is because eggshells contain calcium that raises, or neutralizes, the pH level in surface layer of acidic soils. In the present study, the highest Calcium content was determined in the eggshell of lapwing (96.46%) and hybrid hen (95.28%), this was followed by duck and Pigeon and least in the Swift eggshell (68.06%). Chicken eggshells can be used as an alternative soil stabilizer like lime since they have the same chemical composition. The multiple uses of eggshells in nutrition and medicine and can be utilized for various purposes that minimize their effect on environmental pollution.