What is wrong with the costco brand fishoil exactly? Its Usp Certified for potency and manufacturing process, Fishoil is not supplied from farm rasied fish. State-of-the-art molecular distillation is used to remove pcb's and dioxins. At 9 dollars for 400 pills as well? I mean if I am wrong ill shell out the money but saving 20-30 dollars so I can use that for another supplement is nice.
Hondaman-
Here is a quote form an expert in the Omega 3 industry-
According to Dr. Moerck:
"[A]ll the reputable fish oil companies, the big boys in the industry… refine the fish oil and remove as many of the metals as they can.
When you buy fish oils always pay the highest possible price. Usually a price in this case is a good indicator of quality. A very cheap fish oil is not okay," Dr. Moerck warns.
"
Don't ever buy it in the clear plastic bottle, or giant bottles like you see at some of these mall-type stores... because the light goes right through them. It's UV damaged. It's rancid. Also, if you have a big bottle of it, you better keep it in a refrigerator because it's going to go rancid.
… I believe very strongly that you do have some excellent fish oil being made. But it's very expensive. If you're going to buy that, you should buy it from a distributor that will ship it to you directly. You don't want to buy it off the grocery shelf because you don't know how long it's been there...
… As far as the fish oils we've seen out there, it's a very wide gamut of quality and stability and rancidity. I would say [25 to] 50 percent of them are rancid."
This is important to realize, because taking a cheap poor quality rancid fish oil will surely do you more harm than good.
"I think that there is some mislabeling going on," Moerck says, "[in] that the expiration date put on there is arbitrary and that the actual shelf life is less. I would bet my reputation on that that is the case – that there is fish oil that is mislabeled as far as expiration date.
We have tested these and we have found a very wide range of rancidity even in the same brand."
Now, keep in mind that any company can say their fish oil is USP or Pharmaceutical grade on their fish oil label, because there are no defined standards for using this term.
The fish oil should be bottled or encapsulated at the fish oil processing plant, and should have a nitrogen flush or nitrogen purge added (in the case of encapsulation).
Nordic Naturals and Carlson Labs both do this and get their fish oil from the artic (specifically Norway) and analytical testing has shown this fish oil to be superior in quality (lowest levels of PCBs and heavy metals) to virtually all fish oil.
I've worked for several natural dietary supplement companies in the past (neither of which were Carlson Labs or Nordic Naturals) and virtually everyone that I spoke with in the industry prefers to get their fish oil from those 2 companies. If you attend any Natural Product show, you'll notice a great deal of employees from other companies doing whatever they can to get samples from Carlson Labs and/or Nordic Naturals.
). So with it being anti-catabolic, this would be recommended at the end of a cycle even, of coarse at high concentrations. With antiinflammation atributes, recovery is faster, lubricated joints, lower cholesterol, stronger tendons, etc. Also remember inflammation can include, silent inflammation, cancer, ulcers, migranes, heart attacks, arthritis, etc. Also fishoil can fight free radicals. 
Just do some research on inflammation and get examples of what it is. If you need help lemme know.