Ophiocordyceps sinensis (formerly known as Cordyceps sinensis), is known in English colloquially as caterpillar fungus, or by its more prominent names yartsa gunbu (Tibetan: དབྱར་རྩྭ་དགུན་འབུ་, Wylie: dbyar rtswa dgun 'bu, literally "summer grass, winter worm"), or dōng chóng xià cǎo (Chinese: 冬蟲夏草) or Yarsha-gumba or Yarcha-gumba, यार्सागुम्बा (in Nepali language). It is an entomopathogenic fungus (a fungus that grows on insects) in the family Ophiocordycipitaceae. It is mainly found in the meadows above 3,500 meters (11,483 feet) in the Himalayan regions of Nepal, Bhutan, India and Tibet. It parasitizes larvae of ghost moths and produces a fruiting body which used to be valued as a herbal remedy. However, the fruiting bodies harvested in nature usually contain high amounts of arsenic and other heavy metals so they are potentially toxic and sales have been strictly regulated by the CFDA (China Food and Drug Administration) since 2016.