Olive Oil Nabulsi Soap has only three ingredients: Virgin olive oil, water, and food grade lye. In Nablus, the tradition of olive oil soap-making evolved into a major industry and an art. As early as the 10th century, the traditional olive oil soap from the city’s factories was exported across the Arab world, and as far as Europe, where it is said that "Sabon Nabulsi" (Nablus Soap) was the soap of choice for Queen Elizabeth of England.