Geofagi forekommer hos nogle dyr og kan være normal adfærd blandt disse. Geofagi optræder også hos mennesker, oftest i [[landdistrikt]]er og i præ-industrisamfund og oftest hos børn og [[graviditet|gravide]] kvinder.<ref>{{cite book|author= Abrahams PW |year= 2003 |chapter= Human Geophagy: A Review of Its Distribution, Causes, and Implications |veditors=Skinner HC, Berger AR |title= Geology And Health: Closing The Gap |publisher= Oxford University Press US |ISBN= 0-19-516204-8}}</ref>{{rp|33}} Geofagi hos mennesker er muligvis forbundet med [[spiseforstyrrelse]]n [[pica]], der i ''[[Diagnostic and Statistical Manual of Mental Disorders]]'' (DSM) beskrives som en abnorm trang til at indtage [[Føde (næring)|ikke-nærende]] elementer.<ref>{{cite book |title= Handbook of Evidence-Based Practice in Clinical Psychology, Child and Adolescent Disorders |vauthors=Sturmey P, Hersen M |publisher= John Wiley & Sons |year= 2012  |page=304}} See [https://books.google.com/books?id=Gg8EjCzk1IQC&pg=PA304&dq=pica+hyalophagia&hl=en&sa=X&ei=auncVO75EoKhyATiuIDYDQ&ved=0CC0Q6AEwAw#v=onepage&q=pica%20hyalophagia&f=false Google books link.]</ref><ref>{{cite book |title= A Dictionary of Psychology |author= Coleman AM |publisher= Oxford University Press |year= 2015 |page= 576 }} See [https://books.google.com/books?id=zvlrBgAAQBAJ&pg=PA576&dq=pica+hyalophagia&hl=en&sa=X&ei=auncVO75EoKhyATiuIDYDQ&ved=0CCIQ6AEwAQ#v=onepage&q=pica%20hyalophagia&f=false Google books link.]</ref>
Psykologi Sygdomme