Research

Hormonal

Dietary supplementation with n-3 long-chain polyunsaturated fatty acids (n-3 LC-PUFA) prevents the development of insulin resistance in rodent models fed high-fat or high-sucrose diets, but fails to reverse established insulin resistance in patients with type 2 diabetes.

If you are healthy, incorporating fish oil (EPA/DHA) into your diet may help maintain insulin sensitivity and reduce the insulin spike after eating carbohydrates. However, if you already have Type 2 Diabetes, fish oil supplementation is unlikely to reverse your insulin resistance or lower your blood sugar control metrics, despite its ability to lower triglycerides.

ModerateQualifiesMEDIUM confidence
In rodents in vivo, n-3 LC-PUFA have a protective effect against high fat diet induced insulin resistance... Conversely, in patients with type 2 diabetes, fish oil dietary supplementation fails to reverse insulin resistance for unclear reasons
Jacques Delarue et al. · annales de biologie animale biochimie biophysique · 2004

Why this rating

The paper is a review summarizing multiple animal studies and human trials; while mechanistic data is strong, human clinical reversal data is negative/inconclusive.

Source

n-3 long chain polyunsaturated fatty acids: a nutritional tool to prevent insulin resistance associated to type 2 diabetes and obesity?

Jacques Delarue et al. · annales de biologie animale biochimie biophysique · 2004

DOI 10.1051/rnd:2004033

narrative_reviewCited 207×
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DOI resolved against Crossref · corpus check 2026-06-10

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