Human Male Kidneys AnatomyA double-blind, placebo-controlled study, appearing in Diabetes Medicine (), looked at the effect omega-3 fatty acid supplementation had on patients with type-2 diabetes. In the study, 97 subjects received either four grams of fish oil per day or a placebo for 12 weeks. In the group supplemented with the fish oil, there was a decrease in serum creatinine–indicating an improvement in kidney function. The supplemented group also enjoyed a reduction in triglycerides.