I hesitate to give this product only one star for a couple of reasons. First, I believe that Source Naturals makes high quality supplements. In fact, I use some of their other products (including Omega 3 Fish Oil) and will continue to use them. Second, I did not take the krill oil long enough to be able to determine its effectiveness.Having said that, the one star rating is because I could not tolerate the "fishiness" of the krill oil. The odor upon opening the bottle was almost overwhelming. I took two capsules with breakfast and the fish taste and odor stayed with me the rest of the day. One dose was all I could deal with.I should mention that I never eat shellfish. So, if you're accustomed to eating shellfish, your experience might not be so bad.