Donkey-hide gelatin or ass-hide glue (Latin: colla corii asini) is gelatin obtained from the skin of the donkey (Equus asinus) by soaking and stewing. It is used as an ingredient in the traditional medicine of China,[1][2] where it is called ejiao (simplified Chinese: 阿胶; traditional Chinese: 阿膠; pinyin: ē jiāo).