Value Added Products based on Chicken Eggshell

Egg Shell
Egg Shell

Development of Value Added Products based on Eggshell 



What is the role of calcium in the body?

Calcium is the most abundant element in the human body. Calcium ions play a vital role in the physiology and biochemistry of humans and the cell as electrolytes.

Where is calcium stored in the body?

Calcium levels in mammals are tightly regulated, with bone acting as the major mineral storage site. Calcium ions, Ca2+, are released from bone into the bloodstream under controlled conditions.

How is calcium distributed in the body?

About 98% of the 1200 g of calcium in the adult is in the form of hydroxyapatite in the skeleton. Hydroxyapatite is a lattice-like crystal composed of calcium, phosphorus, and hydroxide. The remaining calcium is found in the extracellular fluid (50%) and in various tissues, especially skeletal muscle.

What is the calcium level in the blood?

In the blood Calcium is maintained within a fairly narrow range from 8.5 to 10.5 mg/dl (4.3 to 5.3 mEq/L or 2.2 to 2.7 mmol/L).

Calcium deficiency is associated with which diseases?

In human being Calcium deficiency is associated with :

  • Metabolic bone disease
  • Rickets in childhood
  • Inadequate bone mass accrual in childhood and adolescence
  • Inadequate fetal bone mass accrual/other metabolic effects and programming
  • Possible secondary vitamin D deficiency
  • Osteoporosis – postmenopausal and senile

How much calcium do I need?

The amount of calcium you need each day depends on your age. Average daily recommended amounts are listed below in milligrams (mg):

Life Stage Recommended Amount
Birth to 6 months 200 mg
Infants 7–12 months 260 mg
Children 1–3 years 700 mg
Children 4–8 years 1,000 mg
Children 9–13 years 1,300 mg
Teens 14–18 years 1,300 mg
Adults 19–50 years 1,000 mg
Adult men 51–70 years 1,000 mg
Adult women 51–70 years 1,200 mg
Adults 71 years and older 1,200 mg
Pregnant and breastfeeding teens 1,300 mg
Pregnant and breastfeeding adults 1,000 mg

What are the composition of Eggshells?

Eggshells contain calcium and trace amounts of other micro elements, i.e. magnesium, boron, copper, iron, manganese, molybdenum, sulphur, silicon and zinc.

What is the major constituent of chicken eggshell?

It is made up of 94% calcium carbonate along with some magnesium carbonate and calcium phosphate.

How can the chicken eggshell can be used for value added products?

Half an eggshell could provide the amount of Calcium needed by adult human beings per day. The best way to use chicken eggshell as Ca dietary supplement is powdered to add to bread, pizza or spaghetti . There will be small changes in texture and no changes in flavor.


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