Fish oil supplements could help reduce the risk for type 2 diabetes, new research suggests.
The supplements, also known as omega-3 fatty acids, increase levels of a hormone called adiponectin that’s linked to insulin sensitivity, Harvard researchers found. Higher levels of this hormone in the bloodstream have also been linked to a lower risk for heart disease.
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“While prior animal studies found fish oil increased circulating adiponectin, whether similar effects apply in humans is not established,” the study’s lead author, Jason Wu, from the Harvard School of Public Health, said in a news release from the Endocrine Society.
For their study, the researchers conducted a “meta-analysis” of 14 clinical trials. A meta-analysis reviews existing research and attempts to find a consistent pattern. In this case, the studies that were reviewed were all randomized, placebo-controlled trials, which is considered the gold standard in research.
“By reviewing evidence from existing randomized clinical trials, we found that fish oil supplementation caused modest increases in adiponectin in the blood of humans,” Wu explained.
Overall, the new study looked at 682 people who took fish oil supplements, and 641 who were given placebos such as sunflower or olive oil.