Fatty fishes such as salmon may prevent kidney cancer

UroToday – Fatty Fish Consumption Associated with Decreased Risk of Renal Cancer in Women
This study showed a significant decrease in the incidence of kidney cancer in women who ate fatty fish such as salmon and mackerel. Lean fish did not show this effect. The researchers thought the main factors were the presence of omega 3 fatty acids (eicosapentaenoic acid, docosahexanoic acid) and Vitamin D.