A large international study found that daily fish oil supplements significantly reduced life-threatening cardiovascular events in dialysis patients. People who took four grams a day had a 43% lower risk of heart attack, stroke, cardiac death, or vascular-related amputations compared to those who received a placebo. These findings stand out because few treatments have successfully reduced cardiac risk in this high-risk group. Supplements with omega-3 fish oil thus reduce heart attacks and strokes by 43% in dialysis patients. The study confirms the positive effect in dialysis patients, where the cardiovascular risk is extremely high.