Eggshell powder, a comparable or better source of calcium than purified calcium carbonate: piglet studies
✍ Scribed by Schaafsma, Anne; Beelen, Gerard M
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 79 KB
- Volume
- 79
- Category
- Article
- ISSN
- 0022-5142
No coin nor oath required. For personal study only.
✦ Synopsis
Powdered chicken eggshells might be an interesting and widely available source of calcium. In two studies using piglets we determined the digestibility of calcium from different diets. The ®rst study compared casein-based diets with CaCO 3 (CasCC) or eggshell powder (CasES). The second study compared soya protein isolate-based diets with CaCO 3 (SoyCC) or eggshell powder (SoyES). Diets were fed to groups of six piglets. Faeces were collected quantitatively. No adverse effects of eggshell powder were observed with regard to magnesium and crude fat digestibility. Calcium from eggshell powder was more digestible than calcium from puri®ed CaCO 3 . In the ®rst study, digestibility coef®cients for calcium were 66.9 (SD 7.9)% for CasCC and 71.3 (SD 3.8)% for CasES. In the second study, these coef®cients were 46.7 (SD 8.6)% for SoyCC, and 65.9 (SD 3.7)% for SoyES, a signi®cant difference. Our conclusion is that eggshell powder is, in the case of casein-based diets, as good a source of calcium as CaCO 3 and, in the case of soya protein-based diets, better than CaCO 3 for growing piglets. As the piglet model is considered to be representative for humans, chicken eggshell powder is also a promising source of calcium for human nutrition.