On the page you pasted click on the top "Fish Oil" bubble and you'll find that the key study was about "Dietary supplementation with n-3 polyunsaturated fatty a

On the page you pasted click on the top "Fish Oil" bubble and you'll find that the key study was about "Dietary supplementation with n-3 polyunsaturated fatty acids ..." From wikipedia http://en.wikipedia.org/wiki/Omega-3_fatty_acid http://en.wikipedia.org/wiki/Omega-3_fatty_acid "n−3 fatty acids (popularly referred to as ω−3 fatty acids or omega-3 fatty acids)" so omega-3 is just another name for n-3 fatty acids and on that chart it's just listed as Fish Oil instead.