Eggshell Calcium Benefits

There are some wonderful studies that show eggshell calcium to be the best and most bio available calcium available.  I find it very interesting to see people giving the recommended recipes for getting the calcium as crushed eggshells in lemon juice.  They also say that this tastes quiet ‘pleasant’.  I have tried the eggshell and lemon calcium recipe and find that not only does it not taste ‘pleasant’, it is quite disgusting.  The best way I could describe the smell is the lovely aroma of the chemicals in a hair perm.  I could not bring myself to taste it, but my husband sacrificed himself for the sake of the experiment.  He confirmed that it was at least as disgusting as it smelled, probably more so.  I tried dissolving the eggshells in Orange Juice, but found that the orange juice was not acidic enough to fully dissolve the shells. 

Meanwhile, Cardiovascular doctors began to say that the cardiovascular implications of calcium supplements out weigh the possible benefits.  Apparently, calcium supplements can accumulate in and around the heart causing an increased risk of heart attack. 1

While a healthy diet rich with calcium and vitamin D is preferable to supplements, eggshells, properly prepared, can be used as an effective calcium supplement for both people and dogs, when required.

The following Scientific paper by Rovenský J1, Stancíková M, Masaryk P, Svík K, Istok R. from the National Institute of Rheumatic Diseases, Piestany, Slovak Republic abstract presents some of the copious amounts of evidence which does support the use of eggshells as an effective supplement:


In this paper the most significant biological and clinical aspects of a biopreparation made of chicken eggshells are reviewed. Eggshell powder is a natural source of calcium and other elements (e.g. strontium and fluorine) which may have a positive effect on bone metabolism. Experimental and clinical studies performed to date have shown a number of positive properties of eggshell powder, such as antirachitic effects in rats and humans. A positive effect was observed on bone density in animal models of postmenopausal osteoporosis in ovariectomized female rats. In vitro eggshell powder stimulates chondrocyte differentiation and cartilage growth. Clinical studies in postmenopausal women and women with senile osteoporosis showed that eggshell powder reduces pain and osteoresorption and increases mobility and bone density or arrests its loss. The bioavailability of calcium from this source, as tested in piglets, was similar or better than that of food grade purified calcium carbonate. Clinical and experimental studies showed that eggshell powder has positive effects on bone and cartilage and that it is suitable in the prevention and treatment of osteoporosis. 2

Another benefit of cooked and crushed (powdered) eggshells is for treating heartburn and acid reflux.  Just place a quarter of a teaspoon of the eggshell powder on the tongue, washed down with water. I find that, in most cases, the heartburn is gone in seconds, and if not, a little more won’t hurt.

Note: Do not throw the powder to the back of the throat or attempt to mix with water, it is very heavy and not water soluble.

To prepare Eggshells:

Rinse well.  Leave the film inside the shell.

Bake at 350℉ – 177℃ for 20 minutes.

Cool and crush.

Grind to a fine powder (coffee grinders are very good for this).

Store in an airtight container, indefinitely.


1. Calcium Supplements May Damage the Heart

Experts recommend caution before taking calcium supplements

Calcium Intake From Diet and Supplements and the Risk of Coronary Artery Calcification and its Progression Among Older Adults: 10‐Year Follow‐up of the Multi‐Ethnic Study of Atherosclerosis (MESA)

John J.B. Anderson, Bridget Kruszka, Joseph A.C. Delaney, Ka He, Gregory L. Burke, Alvaro Alonso, Diane E. Bild, Matthew Budoff, and Erin D. Michos

Originally published11 Oct 2016
Journal of the American Heart Association. 2016;5

2. Eggshell calcium in the prevention and treatment of osteoporosis.

Int J Clin Pharmacol Res. 2003;23(2-3):83-92.

Rovenský J1, Stancíková M, Masaryk P, Svík K, Istok R.

National Institute of Rheumatic Diseases, Piestany, Slovak Republic.

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