It's a good product. Although the price is quite high. I have not noticed much effect. And I daresay it would be hard to do so unless you do some medical examination before and after taking it. No side effects which is always a plus.
Olympian Labs is one of my preferred companies. This krill oil has very good specifications. Good ratio between DHA, EPA and Astaxanthin. I take two softgels per day: one in the morning and one in the evening. Krill oil is never cheap and this one is not an exception. That's why I often buy California Gold Nutrition's oil, which is a better deal. When it is on sale, I buy this one.