Related Experiment Video
Updated: Aug 20, 2026

Mechanical Separation and Protein Solubilization of the Outer and Inner Perivitelline Sublayers from Hen's Eggs
Published on: January 27, 2021
[Hen's eggshell calcium]
1R&D Division, Q.P. Corporation, Japan.
Abstract:
In Japan, insufficient calcium (Ca) intake is serious problem for health which may be associated with the high prevalence of osteoporosis among the aged. The intake of most nutrients has been sufficient, however, the Ca intake has never been sufficient. Eggshell Ca has as much as 38% of Ca and low phosphorus content. Eggshell Ca was more soluble than Ca carbonate and was as much as milk products. Eggshell Ca has been shown to exhibit higher absorptivity and availability than Ca carbonate. Furthermore, it has been reported that eggshell Ca is more effective in increasing bone mineral density in ovariectomized osteoporotic rats. These results suggest that eggshell Ca could be beneficial for bone and we propose Ca fortified foods which contain eggshell Ca as a nutraceutical.
Related Concept Videos
Skeleton and Calcium Homeostasis
Essential Minerals for Bone Health
Calcium and Phosphorus
Calcium is a critical component of bones, especially in the form of calcium phosphate and calcium carbonate. Since the body cannot make calcium, it must be obtained from the diet. However, calcium cannot be absorbed from the small intestine without...
Hormones and Bone Tissue
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
Roles of Electrolytes: Calcium and Phosphate
The calcium concentration in blood plasma is primarily regulated...
The Parathyroid Glands
Oxyphil cells, whose functions remain elusive, emerge during late puberty, adding a layer of complexity to the parathyroid gland's intricacies. In contrast, principal parathyroid cells undertake a vital role by producing...
The Bone Matrix
