title: Selenium, an "essential poison".
mesh_terms: D000818:Animals; D002645:Chickens; D005260:Female; D006801:Humans; D008099:Liver / Q000187:drug effects / Q000473:pathology; D009747:Nutritional Physiological Phenomena; D051381:Rats; D012643:Selenium / Q000378:metabolism* / Q000633:toxicity
chemical_list: D012643:Selenium