Salep is a plant, and tubers of this plant consumes as powder form to produce hot beverage named also salep and as a food ingredient used as natural stabilizing agent in ice cream industry. Because of insensible collection of some salep species are in process of extinction and such species were prohibited by the Republic of Turkey Ministry of Food, Agriculture and Livestock. The tubers of Anacamptis pyramidalis, Dactylorhiza romana, D. osmanica var. osmanica, Himantoglossum affine, Ophrys fusca, Oph. holosericea, Oph. mammosa, Orchis anatolica, O. coriophora, O. italica, O. mascula ssp. pinetorum, O. morio, O. palustris, O. simia, O. spitzelii, O. tridentata, and Serapias vomeracea ssp. orientalis are used. The aim of this study is to review the studies done about salep.