Surely many variables determined the Inuit's remarkable health, including lots of physical activity, clean air and water, a close community of supportive social connections, a relatively homogenous population with similar genetics, and yes, their diet, too.
This study does not tell us if these are valid concerns or not, and we can't make any meaningful conclusions from this new study. This study does NOT indicate that omega-3 supplementation or eating fish are a contributory factor in the prostate cancer equation for numerous reasons.
Except for the added cost, there isn't much of a downside to buying organic. But if you can't afford the added cost of organics, fill up your recyclable shopping bag with the freshest produce you can find and you'll be serving yourself and your family well.
You may have heard about "functional foods." Nutritionists and marketers use this term to describe foods that go beyond the basics of supplying nutrients to the body and appear to help ward off and combat certain chronic illnesses.