What causes pica?
The cause is not completely known. Historically, pica has occurred during times of famine or when individual diets lack certain nutrients or have increased demands for proper nutrition (such as during growth or pregnancy). Diets low in iron and zinc, in particular, are often linked to pica. Some cases of pica stem from cultural beliefs and superstitions, or may result from physiological or psychological needs. Poverty and poor nutrition can contribute to the onset of pica.
