title: I read about fish oil supplements in your September issue. Should I be concerned about mercury levels in these products?
mesh_terms: D019587:Dietary Supplements; D005395:Fish Oils / Q000737:chemistry*; D006801:Humans; D008628:Mercury / Q000032:analysis*; D008630:Mercury Poisoning / Q000209:etiology
chemical_list: D005395:Fish Oils; D008628:Mercury