Fish Oil Supplement Cuts Heart Attack Risk by 43% for Hemodialysis Patients
A modern study published in the New England Journal of Medicine in March 2026 reveals that daily supplementation with n-3 polyunsaturated fatty acids – commonly found in fish oil – significantly reduces the risk of serious cardiovascular events in patients undergoing hemodialysis. The research, conducted by a team of doctors from Canada, Australia, and California, demonstrates a 43% reduction in heart attack risk among this vulnerable population.
Cardiovascular Disease and Hemodialysis
Cardiovascular disease is the leading cause of death for patients receiving hemodialysis, a life-sustaining treatment for kidney failure that uses an external machine to filter blood. Despite the high risk, effective preventive therapies have been limited until now. Researchers noted that while polyunsaturated fatty acids have shown cardiovascular benefits in the general population, their efficacy among hemodialysis patients remained uncertain.
Study Design and Findings
The study assessed 3.5 years of longitudinal data from 1,228 patients at dialysis locations in Canada and Australia. Participants were assigned either a capsule containing corn oil (placebo group) or four grams of n-3 polyunsaturated fatty acids (test group). The results showed a lower rate of serious cardiovascular events in the fish oil group compared to the placebo group.
Specifically, the study found:
- Cardiac death was reduced by 45%
- Heart attacks were reduced by 44%
- Stroke was reduced by 63%
- Peripheral vascular disease leading to amputation was reduced by 43%
Implications for Patient Care
These findings suggest that daily supplementation with n-3 fatty acids could be a valuable addition to the standard of care for patients undergoing hemodialysis. Further research may be needed to determine the optimal dosage and long-term effects, but this study provides compelling evidence for the potential benefits of fish oil in reducing cardiovascular risk within this high-risk population.
Sources
- The Healthy: This Daily Supplement Cut Heart Attack Risk by 43%
- New England Journal of Medicine: This Week — March 12, 2026