Ellie asked about cod liver oil. I find that it gives a clear signal about whether it is "needed". If it smells unpleasantly fishy, I don't have a tablespoon or so. Otherwise I do. Same for Melisa, though she tests it (several times a week) more often than I do (once or twice a week). I wouldn't trust it to provide a taste-change though. TwinLabs plain (Dale Alexander's brand) is the best I can find, but there are unanswered questions about it to my mind: Is it from farmed salmon? Are the accumulated toxins/pollutants more problematic than the EPA etc is beneficial? Still, when we have no fatty fish for a while, I can tell that the cod liver oil is bridging the gap... We get the smallest bottle available. The first half always tastes better than the last half and we tend to throw it out when it starts to oxidize (as eveidenced by smell). YMMV. Cheers, Kirt