Observation studies in different populations have suggested that eating fish once or twice a week would reduce the risk of heart disease. In fish we find a beneficial fatty acid, omega 3, alpha-linoleic acid (ALA), a nutrient essential for the proper functioning of the body.
In 2002, a systematic review showed that consumption of the equivalent of 40 to 60 grams of fish per day (0.2 to 1 g omega-3 per day) was associated with a nearly 50% reduction in mortality. cardiovascular. At the same time, however, several randomized studies have yielded conflicting results with regard to the effects of taking Omega 3.
Mixed results in diabetics
For this new randomized study ASCEND (Study of cardiovascular events in diabetes), published in the New England Journal of Medicine, the independent researchers Clinical Trial Service Unit Oxford University employed 15,480 patients with diabetes and no signs of cardiovascular disease. They wrote 1 gram of capsules containing omega 3 or placebo once every other day (olive oil).
In both groups of patients, physicians assessed the occurrence of severe vascular events for 7.4 years. According to the findings of this study presented European Congress of Cardiology at present, these severe cardiovascular events were not lower in patients receiving omega-3 supplementation (8.9%) than in the placebo group (9.7%). There are also no significant differences between groups in the percentages of non-lethal serious adverse events.
An essential nutrient
Omega-3 is alpha-linoleic acid (ALA). It is a nutrient essential for the proper functioning of the body, because it is unable to produce it. ALA must therefore be brought by food. Omega-3 is alpha-linoleic acid (ALA) and is present in nuts, canola and soya oil and fatty fish such as salmon, tuna and mackerel. It is brought in smaller quantities by meat, eggs and dairy products.
According to the current dietary recommendations, for people susceptible to coronary heart disease, 800 to 1000 mg omega-3 should be consumed per day, while for people without a clear risk 500 mg would be sufficient.
Stop Omega 3 supplements?
Although some recommendations still argue for the use of omega-3 for the secondary prevention of coronary heart disease and advocate the consumption of fish once or twice a week to reduce the risk of cardiovascular disease in primary prevention, researchers from the Oxford University recalls that not all previous randomized studies have been convincing about the benefit of omega-3 fatty acids.
However, the lack of benefit of taking omega-3 supplementation on cardiovascular outcomes in patients treated with other medications can be explained by the fact that statins, the cholesterol drugs that are generally prescribed in diabetics, are very potent, which a modest effect of omega-3 can "crush".
But everything is a matter of relationships, as is often the case with food. The modern lifestyle has favored the consumption of omega-6 fatty acids, which are available earlier than omega-3s, causing an imbalance in favor of omega-6s. Re-balancing by increasing the intake of omega-3 is recommended and consumption up to five times more omega-6 than omega-3. Currently, the trend is to take fifteen times more. We have to reduce omega-6, but it is useless to increase the consumption of omega-3 above a certain limit.
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