My wife and I have been taking fish oil for years. We think it makes a difference in strength, endurance and reduces inflammation. We take Zone Perfect by Dr Sears. We have looked at others but his offers the most EPA per pill. On occassion, we take Costco's fish oil. In my case, I am highly allergic to fish but the refined oil is not a problem. According to my doctor, it is the protein and carbohydrate that trigger the reaction not the fat.