When we eat the plant based form of omega threes, there's a process by which those fatty acids get elongated in our bodies. But that it's my understanding that that the efficacy and efficiency of those processes vary widely from person to person, gender to gender. And so if fish oils are not properly protected from oxygen in there, as they're prepared or they're liking capsilations and all this, then the oil can go rancid.
Bill Harris, PhD is an internationally recognized expert on omega-3 fatty acids and fish oil. He has more than 300 publications relating to fatty acids, including omega-3s, in the medical literature.