An Egg Shell: A Nutritional Profile and Health Benefits

Calcium is one of the most fundamentally significant and essential component for the human body since it makes up the majority of the skeletal system in humans (98%). The goal of the present review study was to discuss calcium’s importance in everyday life, calcium absorption theories, eggshell (ES) deposition, and its nutritional makeup. There are two phases to ES formation. 5.5 grams of calcium carbonate, or about 95% of the dry ES, are present. One ES contains traces of sodium, potassium, zinc, manganese, iron, and copper as well as 0.3% phosphorus, 0.3% magnesium, and sodium, potassium, zinc, manganese, and iron. Vitamin D is necessary for calcium absorption; hence, calcium bioavailability is influenced by dietary calcium intake as well as vitamin D status. Calcium may reabsorb at a number of places along the nephron. Intestinal acidity (particularly for CaCO3 absorption), oestrogen, vitamin D, and soluble fibre/prebiotics, probiotics, and synbiotics are some of the elements that have been shown to favourably boost calcium absorption. Pulsed electric fields, high-energy milling, and electric discharge-assisted mechanical milling are relevant techniques that have been studied and might be used to extract calcium from ESs. Researchers looked at the health benefits of eggshells and different ways to get the calcium out of eggshells to see if they could be used to make a good calcium supplement.