Oily fish and omega 3 fat supplements -- Brunner, 10.1136/bmj.38798.680185.47 -- BMJ

Oily fish and omega 3 fat supplements -- Brunner, 10.1136/bmj.38798.680185.47 -- BMJ
(recomendado por Marcelo Gustavo Colominas [mgcolominas@hotmail.com])
Seventy five years ago, long chain omega 3 fatty acids were added to the list of essential nutrients. Later in the 20th century, the properties of marine polyunsaturated oils were linked with several health benefits, including protection from cardiovascular disease. However, a high quality systematic review draws attention to uncertainties about some of the health enefits attributed to omega 3 fats.
The review shows that the evidence for a reduction in cardiovascular vents and mortality is less conclusive than we believed.
A previous meta-analysis indicates that mortality is reduced wing to fewer fatal coronary events among people ingesting mega 3 fatty acids, but the current review found no strong evidence f a reduction in combined cardiovascular events. The laim that omega 3 fats reduce the risk of cancer is not upported here or by another recent systematic review. For each ealth outcome there are too few trials with adequate allocation oncealment, and too few cohort studies in which the intake of
omega 3 fat rather than total fish intake was measured.
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We are faced with a paradox. Health recommendations dvise increased consumption of oily fish and fish oils, within imits,9 on the grounds that intake is generally low. However, ndustrial fishing has depleted the world’s fish stocks by some 0% since 1950,11 and rising fish prices reduce affordability particularly or people with low incomes. Global production trends figure) suggest that, although fish farming is expanding rapidly, e probably do not have a sustainable supply of long chain mega 3 fats.