Is there something fishy about fish oil? 27. January 2010 William Davis (0) To be sure, there's plenty of misinformation out there about fish oil. Take a look at the swill that passes for health information on Woman's Day: On Call with Dr. Sandy: Fish Oil and Mercury:Reader Question: My doctor recommended that I take a fish oil supplement, but I'm concerned about mercury. Is there any way to tell which brands are lowest in mercury content?On Call Response: When it comes to OTC supplements, the answer is no. Though most fish oil supplements sold by major brands are probably safe, there's really no way to tell what's in the bottle or how much mercury it might contain.Perhaps Dr. Sandy should read the many independent analyses performed on nutritional supplement fish oil, including those at Consumer Lab and Consumer Report before she offers her blind criticisms.