The Great Supplement Delusion: Omega-3 Supplements Not Beneficial
More and more scientific evidence disproving effectiveness of dietary supplements is being accumulated. Another piece of news that has recently come as a surprise is that fish oil and other supplements rich in omega-3s are not beneficial. While natural fish remains part of healthy diets, omega-3 pills now have a tarnished reputation.

A long story
It all started with two Danish doctors who noticed that peoples living in Greenland rarely developed coronary heart disease, which led them to think it had something to do with their diet. It turned out their staple food was fatty, and since this fat was rich in omega-3s, they came to the conclusion that it was this compound that helped the Inuit people keep their heart healthy. However, it appears that omega-3s themselves, if taken separately, do not have an effect equal to the one described by Danish physicians. The whole fish contains a good many other compounds, and it is their interplay that can benefit health, not fats alone. Besides, recent researches showed that the actual disease rate is just as high as in Western people! While experiments in Petri dishes and mice suggest omega-3s could help prevent blood clots, improve hearth rhythm, reduce inflammation and benefit the heart some other ways, studies in people reveal no similar effect.Something fishy

If you want to supply your body with enough nutrients, following a healthy diet, which includes fish, is still the best option. You can opt for salmon and other fatty species, which contain a lot of omega-3s. Fish should be accompanied by whole grains and vegetables: the good old Mediterranean diet is believed to be one of the most beneficial diets for heart health.
References:
Associations of Omega-3 Fatty Acid Supplement Use With Cardiovascular Disease Risks –Jamanetwork.com
Omega-3 fatty acids for the treatment of dementia – Cochrane.org
Omega-3 Polyunsaturated Fatty Acid (Fish Oil) Supplementation and the Prevention of Clinical Cardiovascular Disease – Circ.ahajournals.org