Among previous proprietors of Shihchinyu Sanfang, the fourth-generation boss lived to 130 years and the fifth generation to 93 (although the sixth only made it to 70). Their longevity suggests that not only is natural incense not cancerous, but it can in fact help one to live to a ripe old age. Incense is only harmful when unscrupulous people in the industry don't follow the proper ways and use chemical additives.
施金玉第 4 代祖先高齡 130 歲、第 5 代 93 歲，第 6 代則是年過 70 才去世，也間接佐證了使用天然物質的香，不但不會有致癌之虞，還可以延年益壽；傷人的是不肖業者不按規矩，亂加便宜化學成分才導致的結果。