Taking omega-3 fatty acid supplements has been shown in some studies to raise levels of irisin—a molecule linked to muscle and brain health—in people with type 2 diabetes.
Evidence from Studies
No evidence studies found yet.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Whether omega-3 supplementation consistently increases irisin levels across diverse populations with type 2 diabetes and whether this effect is dose- and duration-dependent.
A systematic review and meta-analysis of at least 8 randomized controlled trials measuring serum irisin before and after omega-3 supplementation (dose range 1000–4000 mg EPA+DHA/day) for 8–24 weeks in adults with type 2 diabetes, with pooled effect sizes and subgroup analysis by baseline irisin, BMI, and glycemic control.
Whether omega-3 supplementation directly causes an increase in irisin independent of changes in inflammation or insulin sensitivity.
A double-blind RCT of 120 adults with type 2 diabetes and elevated triglycerides (>150 mg/dL) randomized to 3000 mg/day EPA+DHA or placebo for 16 weeks, with serum irisin, CRP, HbA1c, and muscle strength (leg press) measured at baseline and endpoint, controlling for diet and physical activity.
Whether higher dietary omega-3 intake predicts higher irisin levels over time in individuals with type 2 diabetes.
A prospective cohort study of 350 adults with type 2 diabetes followed for 3 years, with annual dietary assessment (food frequency questionnaire) for omega-3 intake and serum irisin measurement, adjusting for age, sex, BMI, and medication use.
The association between dietary omega-3 intake and circulating irisin levels in a population with type 2 diabetes.
A cross-sectional analysis of 300 adults with type 2 diabetes, measuring dietary omega-3 intake via food frequency questionnaire and serum irisin levels, adjusting for age, sex, BMI, HbA1c, and total energy intake.
Whether extreme omega-3 intake leads to dramatic irisin increases in individuals with type 2 diabetes.
A case series of 5 individuals with type 2 diabetes who consumed >5000 mg/day of EPA+DHA for 12 weeks and exhibited >50% increases in irisin alongside improved lipid profiles.