Is chalk eating harmful?
read this, it shall tell u everything : Geophagy From Wikipedia, the free encyclopedia Jump to: navigation, search Geophagy is a practice of eating earthy substances such as clay, chalk, and laundry starch, often to augment a mineral-deficient diet. While most often seen in rural or preindustrial societies among pregnant women, it also occurs among children and as a psychological eating disorder. Geophagy is a type of disorder known as pica. In parts of Africa and among some African Americans, clay consumption may be correlated with pregnancy as women eat clay to eliminate nausea possibly because the clay coats the gastrointestinal tract and absorbs dangerous toxins. The clay may also provide critical calcium for fetal development. Bentonite clay is available worldwide as a digestive aid, kaolin is also widely used as a digestive aid and as the base for some medicines. Geophagy was also practiced by Native Americans who would eat earth with acorns and potatoes to neutralize potentially
