When eaten, mung beans and Job's tears have cooling and diuretic effects. In soap, they reduce freckling, smooth the skin, and act as an exfoliant. People who suffer from eczema, prickly heat, and other conditions that cause itching for unknown reasons find some relief in a Yuan soap made with colorful, fragrant Asian puccoon and hibiscus, which contain skin-soothing allantion.
此外，一般人經常食用、可清火利尿的「綠豆薏仁」，對於改善色斑、雀斑，皮膚粗糙、脫屑很有幫助；色澤與香味兼具的「紫草洛神」，因蘊含舒緩皮膚功效的尿囊素，適用於長濕疹、痱子，皮膚不明原因搔癢的人。