"In Germany and Switzerland betel nut is used as a household insect repellant, and it can also be used as an ophthalmic astringent," herbal doctor Chang Sen-yung maintains.
「德國、瑞士利用檳榔做為家畜除蟲劑，此外，也可提煉為眼藥的收歛劑」，中醫師張森永表示。