Research on comestible earths utilized in the Andes indicates that they have a history of use of at least 2500 years. A hypothesis proposed for the origin of geophagy suggests a considerably greater time depth. Comestible earths discussed involve those with physiological, cultural, or medicinal components. This analysis includes 27 indigenously recognized earths.
No takes yet. Share an insight, caveat, or question.
Browman et al. (1993) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: