At that time it was also widely believed that refined concentrates of certain substances such as mercury, sulfur, lead, gold and arsenic, could perform the function.
在這尋求仙藥的道士隊伍中，有一派人認為不必跋山涉水的找，只要常服食丹藥就可以了。於是他們開始煉丹，所用的藥物有：汞、硫磺、鉛、金、砒霜等。