Thanks Mark. That's an interesting article - lots of references too.

The place I learned that Vitacost is EE is at one of the reviews on the product at the VitaCost link you sent. A four-star review by a person named JeffA1 answered the question below:

Q: What form of fish oil is used, ethyl-ester or triglyceride? A: Ethyl-ester

I'm not sure where he got his information but that's all I had to go on. I'm finding that the Internet certainly isn't short of material on the science of fish oil.

This trial I'm going through (Dr. Lewis protocol) should be interesting. I've read some have also made a correlation between EPA and mood - something I'm interested in as well.