Fish oil (active ingredients omega-3 DHA and EGA) is a natural blood thinner, that is, it slightly retards coagulation and clotting - which I guess is what we're really after.*

There is also the GLA in evening primrose oil which is supposed to simultaneously make blood more "slippery" as do blood thinners, and also *encourage* clotting where it is needed. I take it on occasion more for the second purpose than the first. I've been searching for a long time to hear if anyone has good guidance as to how it affects medical conditions.

I have long wondered what one or both of these offer instead of the prescription blood thinners. AFAIK neither causes any serious problems with too much bleeding.

*I should add, the thing about omega's is that they need to be in balance, with a dietary ratio of about 6:3:1 for omega 6, omega 3, and omega 9 (best from EVOO). Since most people get far too much omega-6 in red meat and seed oils, simply cutting back on omega-6 may be as effective as taking more omega-3!