A pilot study published in the American Journal of Clinical Nutrition (December 2007) examined the effects of omega-3 fatty acid supplementation on body fat and metabolic markers in women with type 2 diabetes.

The study included 27 women with type 2 (non-insulin-dependent) diabetes. Participants were randomly assigned to receive either three grams of fish oil or a placebo daily for two months.

At the end of the study period, women receiving omega-3 supplementation showed:

  • A reduction in total body fat

  • A decrease in fat cell size

  • Lower triglyceride levels

  • An improved HDL-to-triglyceride ratio, a marker often associated with cardiovascular risk

  • Reduced expression of certain inflammatory genes within adipose (fat) tissue

These changes were not observed in the placebo group.

Context

Adipose tissue is now recognized as a metabolically active organ that influences inflammation, lipid metabolism, and cardiovascular risk. The observed reductions in fat mass, fat cell size, and inflammatory gene expression suggest that omega-3 fatty acids may influence adipose tissue biology in people with type 2 diabetes.

While this was a small, short-term study, the findings add to a growing body of research linking omega-3 fatty acids with improved lipid profiles, reduced inflammation, and favorable metabolic changes. Rather than acting as a weight-loss agent per se, omega-3 fatty acids may help shift metabolic and inflammatory balance in ways that support cardiovascular health in people with diabetes.