Studies for supplements tend to vary all over the place.
This is because the variables are not carefully taken into consideration.

One study now....needs corroboration, and better control.

This link explains other variables and fish oil:
http://health.heraldtribune.com/2013...-pretty-fishy/

People can do what they think is best however. In this house hubby continues his omega-3's, he's been taking them for over a decade now. He doesn't eat fish, so he only uses a small amount of fish oil. Not in the mega gram range.

Omega-3's are involved in cell membrane repair. So one has to have them either in food or supplements. They are essential...meaning we need to consume them in some manner.

There is also controversy about flax and prostate health:
http://www.mayoclinic.org/diseases-c...d/faq-20058328

The bottom line is moderation, I would presume. Because without any, there is no repair of tissue, or support of the immune system, leading to serious declines in health.

Yes, studies are all over the place for sure. We both take our fish oil for many reasons.

To paraphrase the preeminent sage of our day...
Often as bad/worse than the studies themselves are the erroneous conclusions drawn, and outrageous, sensationalizing, & misleading statements made, by the media reporting them. E.g. most of what shows up in the Health News Headlines forum.

Scary stories? The futurist in me has long thought (since the early '70s) that one day there will be only one cause of death on death certificates...

Everything Causes Cancer!

Surgeon General's Warning: Living Causes Cancer!

Doc

That's not unusual. There are some supplements I take because they make a tangible difference, others I take because I know (from reading/learning) that I should (they're just a good idea for persons like me—everyone is different/has different criteria) even though I don't notice much/anything, and some I've discontinued. (ALC and Glucosamine/Chondroitin/Msm fall into this latter category for me.)

Also not unusual is that while some supplements' benefits are noticable almost immediately, others take longer or work more slowly—so slowly that it may not be readily noticable. Keeping a medication diary/journal can sometimes help in sorting this out.

You guess correctly, but hopefully it will be well worth the effort.

Doc