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Geophagia
Practice of eating earth or soil-like substrates such as clay or chalk / From Wikipedia, the free encyclopedia
Geophagia (/ˌdʒiːəˈfeɪdʒ(i)ə/), also known as geophagy (/dʒiˈɒfədʒi/),[1] is the intentional[2] practice of eating earth or soil-like substances such as clay, chalk, or termite mounds. It is a behavioural adaptation that occurs in many non-human animals and has been documented in more than 100 primate species.[3] Geophagy in non-human primates is primarily used for protection from parasites, to provide mineral supplements and to help metabolize toxic compounds from leaves.[4] Geophagy also occurs in humans and is most commonly reported among children and pregnant women.[5]
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Human geophagia is a form of pica – the craving and purposive consumption of non-food items – and is classified as an eating disorder in the Diagnostic and Statistical Manual of Mental Disorders (DSM) if not socially or culturally appropriate.[6] Sometimes geophagy is a consequence of carrying a hookworm infection. Although its etiology remains unknown, geophagy has many potential adaptive health benefits as well as negative consequences.[5][7]