Omega-3 fatty acid supplements from fish, plants or both show no significant benefit.
There is growing interest in the possibility of reducing the risk of heart disease by supplementing with fish-based omega-3 fatty acids (EPA and DHA) or plant-derived alpha-linolenic acid (ALA). Using a multi-center, double-blind, placebo-controlled study of 4837 older men with heart disease, researchers found during an almost four year follow-up that none of the supplements from fish or plants showed any significant advantage over the placebo.
PositiveTip: Including adequate plant-derived omega-3 fatty acids from dietary sources (nuts, vegetable oils) will not hurt you, but they are probably not a magic bullet for preventing heart disease.
Olive oil works as well as fish oil in preventing dementia.
Everyone wants to prevent dementia! Companies who manufacture fish oil supplements loudly proclaim the possible benefits of omega-3 fatty acids for this problem. But a 2-year British study of elderly subjects (the longest and largest study ever done on this subject) has compared the use of omega-3 fatty acids from fish oil with an olive oil placebo. The study found no differences between the groups, except that those taking the highly recommended fish oil had more flatulence, belching and loose stools!
PositiveTip: An active mind and a healthy lifestyle are the best way of reducing the risk of dementia.