Effects of omega-3 supplementation on body weight and body fat mass: A systematic review
2021
Summary Background Omega-3 is a supplement that promotes several health benefits. The evidence on omega-3 in weight loss or body fat mass is inconclusive. This study aimed to review the literature on studies that evaluated the effect of omega-3 supplementation and changes in weight and/or body fat mass in humans. Methods A systematic review, following the recommendations of PRISMA, in the databases Pubmed, Lilacs, and Scielo. Only experimental studies in humans that evaluated the effects of supplementation with omega-3 on weight loss and/or body fat mass were included. Results In total, 20 studies were selected, of which 11 found no effect, and the other nine find some benefits. Two studies found a reduction in individuals' body fat, and a third found these results in women and a fourth only in men. In children and adolescents, one study found a difference in weight loss between groups. Four studies reported decreased body weight in women, and in men, only one found this result. Conclusion To date, there is no consistency in the literature that omega-3 has benefits in weight loss or body fat mass in humans. Due to the studies' heterogeneity and inconsistency in the results, further studies on the subject are necessary.
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