In a recent systematic review, researchers found that omega 3 fatty acid intake is effective in reducing pain in rheumatoid arthritis patients. The analysis of 18 randomized, controlled trials showed a dose of between 3 and 6 g daily had the best effect.
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In a study measuring fatty acid status in infants, researchers looked at the risk of type 1 diabetes. The results showed fish-derived fatty acids consumed during breastfeeding may provide protection against type 1 diabetes.
Researchers have found that taking 2.4 g of fish oil daily during the third trimester of pregnancy reduces the risk of asthma or wheeze in children by 30.7%. The effect was strongest for the children of mothers with the lowest blood levels of eicosapentaeonic acid (EPA) and docosahexaeonic acid (DHA) at the beginning of the study. For these mothers, the risk for asthma in offspring dropped by 54%. Fish oil supplementation also resulted in a 25% reduced risk of lower respiratory tract infections in children when compared to the control group.
Supplementation with EPA and DHA for 8 weeks has been shown to reduce systolic blood pressure. The authors conclude “these findings indicate that in adults with isolated systolic hypertension, daily doses of EPA and DHA as low as 0.7g show clinically meaningful BP reductions, which, at a population level, could be associated with lower cardiovascular disease risk”. This dose is possible in the diet as oily fish like salmon, mackerel, tuna and trout have an average of 1 g of omega-3 fatty acids per 100 g of fish.