Is it ok to take fish oil everyday? some research says it can cause prostate cancer.

Fish oil: Did you ever see a fish with prostate cancer?.....:) To be serious about this, there is lots of conflicting evidence so if you're desirous of taking fish oil, just don't take large doses of it. It was large doses which might cause prostate ca.

That's your business: The work over the past decade on fish oil has been horribly disappointing in terms of proposed benefits. I also saw the article claiming a link to prostate cancer and was totally underwhelmed. I'd urge you to eat a sensible and balanced diet and spend several hours a week doing serious aerobic fitness & some resistance training as well. Health doesn't come out of a pill bottle. Best wishes.