Son riuscito ad ottenere l'articolo, che vi linko giusto per condivisione di conoscenza (spero per questo di non commettere nessun reato tanto grave).
Fish, Long-Chain Omega-3 Polyunsaturated Fatty Acids and Prevention of Cardiovascular Disease—Eat Fish or Take Fish Oil Supplement?
http://www.fileden.com/files/2012/6/28/3321133/articolo.pdf
lo studio, del 2009, sembra essere ben condotto, in realtà è una ricognizione ponderata di studi passati che prendevano in considerazione gli effetti degli acidi grassi omega3, soprattutto in riferimento al pesce negli alimenti (omega3 a catena lunga).
Si conclude dicendo:
It is not clear how much intake of LCn3PUFAs may be required to significantly reduce the risk of CVD or what the optimal dose is of LCn3PUFAs for primary prevention of CVD. Also, the possibility of interactions between LCn3PUFAs and some unknown constituents in fish providing synergistic effects cannot be ruled out. Although further studies are needed, one should be cautious in recommending people to use fish oil supplements rather than to eat whole fish. In addition, the amounts of LCn3PUFAs in different types of fish may vary. One would expect to observe more benefit by eating fatty fish rich in LCn3PUFAs if any beneficial effect of fish intake on risk of CVD is largely attributable to its content of LCn3PUFAs. However, data are very limited regarding the effect of intake of different types of fish on CVD risk. Furthermore, how cooking methods may modify benefits of fish consumption and what the optimal way is for cooking fish remain unanswered and merit future research.