How to Make Calcium Powder from Egg Shells If you need more calcium in your diet or are buying supplements, try making calcium powder from eggshells. When SHTF, there isn’t going to be a CVS to go buy more. . . Calcium supplements cost significantly more than a carton of eggs. Save yourself some money and make your own! You can add calcium powder to your food or you can take a ½ teaspoon and stir it into water and drink it thataway. Ladies, this is a very useful trick to help us with our bones. We are already disadvantaged in that department. http://www.lahealthyliving.com/healthiest-food/eggshells-calcium-rich-food/