Update: I didn’t notice any benefits from discontinuing fish oil, and I feel better on my regular supplemental dose (about 3g/day). My latest thinking is that fish oil may calm down an overactivated immune system via increasing IL-10, and that this may be helpful not only for asthma but for any number of conditions where tissues can get “stuck” in an inflammatory state.
Fish oil has been good to me. It was the first supplement that I noticed reduced my asthma symptoms, over fifteen years ago. Along with dietary changes, supplemental vitamin D, and evening primrose oil, I used 2-4 grams of fish oil per day, and for the most part stayed asthma free.