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WHY DO PEOPLE EAT CHALK? THE SCIENCE BEHIND PICA DISORDER

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Have you ever been puzzled by social media videos of people consuming chalk, or heard stories about individuals craving substances like clay or ice?   While these behaviours might seem strange or concerning, they're often manifestations of a recognized psychological condition called pica disorder. This blog explores the fascinating science behind this condition, with a particular focus on chalk consumption. What is Pica Disorder? Pica disorder is characterized by the persistent consumption of non-nutritive, non-food substances for at least one month. These substances can include: Chalk (calcium carbonate) Clay or soil (geophagia) Ice (pagophagia) Paper Paint chips Hair Cloth Pebbles or stones Metal objects Ash or charcoal According to diagnostic criteria, this behaviour must be developmentally inappropriate (not normal for the person's age or developmental stage) and not part of a culturally supported practice. While exploration through mouthing o...