title: On call.  I keep reading about health benefits of eating fish, but I've also heard that fish contain high levels of mercury.  Should I be concerned?
authors.forename: William
authors.initials: W
authors.lastname: Kormos
mesh_terms: D000818:Animals; D004781:Environmental Exposure / Q000009:adverse effects / Q000517:prevention & control*; D015525:Fatty Acids, Omega-3 / Q000008:administration & dosage*; D005399:Fishes; D005506:Food Contamination / Q000517:prevention & control*; D015438:Health Behavior; D006331:Heart Diseases / Q000517:prevention & control; D006801:Humans; D008630:Mercury Poisoning / Q000517:prevention & control*; D008767:Methylmercury Compounds / Q000506:poisoning*
chemical_list: D015525:Fatty Acids, Omega-3; D008767:Methylmercury Compounds