And it's worth emphasising, from the perspective of supplementation, that "In keeping with previous information, fish intake was protective against fatal CHD (RR, 0.83 [95% CI, 0.71-0.94]), but marine ω-3 fatty acids (0.88 [0.66-1.11]) and α-linolenic acid (0.98 [0.60-1.36]) were not."
Unless...