Alexander Woywodt, Geophagia: The History of Earth Eating, Journal of the Royal Society of Medicine, Volume 95, March 2002
Geophagy is defined as a willful consumption of earth, soil or clay. From different viewpoints it has been regarded as a psychiatric disease, a confined cultural practice or a result of poverty and famine. The authors of Geophagia: The History of Earth Eating found, however, that geophagy do not allow simple categorisation of psychiatric disorders or cause by famine. Geophagy is multifactorial and occurs in many regions of the world, across cultures and geographies.
Geophagia-the history of earth eating [pdf]
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