 research on this and there's quite a few studies that examine the potential risk of taking fish oil supplements before surgery and definitely your surgeon is going to say don't take omega-3 fatty acids because you're going to have more serious bleeding during surgery you don't want that they'll tell you to get off blood thinners they'll tell you to get off aspirin they'll tell you to get off fish oil maybe certain other supplements that they consider blood thinners well here's a study looking at children