evidence: That sounds uncomfortable, but a porcupine’s health probably doesn’t suffer due to the presence of this undigested mass in its stomach or intestines—that is, not until humans come along. [...] This paper calls for more study about this issue and additional conservation actions to protect porcupines. Currently the various species enjoy some national-level protection but precious little on the international level, because they’re still perceived as relatively common. In fact, most old-world porcupine species currently appear on the IUCN Red List as either "least concern" or "data deficient." Only the Philippine porcupine (Hystrix pumila) is listed as "vulnerable to extinction." None are currently protected by the Convention on Trade in Endangered Species. [...] And while some porcupines are farmed, this study indicates pressure on wild porcupines, which also face threats from habitat destruction and the bushmeat trade, as well as persecution as agricultural pests. It suggests a need to protect certain populations which fetch higher prices due to their purported purity. The study quotes one popular website: "The most valuable for the porcupine bezoars are procured from … the rainforest of Indonesia or Borneo. The porcupines here eat unpolluted herbs that have high medicinal value causing the bezoars … to be of the rarest and highest value. The price is very high and has collection, medicinal and stockpiling value."