There is no blood thinning activity. I’m sure you will find, if delving into the massive abyss of information on the internet regarding fish oil, conflicting information regarding the blood thinning properties of omega-3s.
The entire blood thinning idea is a false conclusion that has persisted for 30 years – and it is been proven that it is caused by something else, not an omega3.
You might find more information in this link omegaquant.com/do-omega-3s-thin-the-blood