Cochrane is good, but not infallible.<p>If you read farther down in your first link: There was no significant effect on total mortality. Do you care if you have reduced your risk of CVD death, if risk of other deaths increase?<p>The second review is pretty much worthless for the point at hand as it is just determining if dietary advice affects risk factors (and the main benefit found- total LDL reduction- is not a good risk factor anyways).