Ellie, I'm not sure about the algin - someone else needs to answer that one. But re: cod liver oil: I have been taking Nordic Naturals cod liver oil and have had no noticeable problem. They are supposed to be the top notch specialists in mercury-free cod liver oil, but now I wonder, because Carlson's was supposed to be really good too. <img src="/ubbthreads/images/graemlins/confused.gif" alt="" />