Native to western and central Africa, the shea tree is a member of the Sapotaceae family, best known for the kernels contained in its nuts, which are used to produce shea butter. The tree, which grows directly in the savanna, is one of the many threatened species on the IUCN Red List due to harvesting and human-caused brush fires. It takes 50 to 100 years to reach full maturity. In fact, its growth is so slow that it reaches adulthood only after 30 years. It is then able to produce 15 to 30 kilograms of fruit per year, for six kilograms of dry kernels that yield two kilos of shea butter.