By Dr Krunal Tamakuwala
Consultant Interventional Cardiologist
March 02, 2026
From triglyceride reduction to inflammation control — understanding the clinical role of omega-3 fatty acids in cardiovascular health
Heart disease continues to be a major public health burden in India. In addition to traditional methods such as medications, dietary changes, and physical activity, there is an increasing focus on the role of omega-3 fatty acids as a complementary strategy for reducing cardiovascular risk.
Omega-3 fatty acids—particularly those derived from fish oil—have been widely studied for their cardiometabolic effects. Although they do not replace standard medical therapy, growing clinical evidence suggests that they may support heart health by improving selected risk markers and complementing comprehensive preventive care.
This overview summarises the science behind omega-3s, their clinical relevance, major trial data, and practical guidance for safe use.
Several modifiable and non-modifiable factors contribute to the development of heart disease, including
In recent years, chronic low-grade inflammation has also been recognised as an important driver of plaque formation and progression of vascular disease.
Omega-3 fatty acids exert multiple biological effects that are relevant to cardiovascular protection. The most consistently studied benefits include
The three principal omega-3 fatty acids are
For clinically meaningful effects, EPA and DHA obtained from marine sources or supplements are generally required.
Marine sources
Plant sources
Oils
Most guidelines suggest
Higher therapeutic doses may be prescribed specifically for patients with significant hypertriglyceridaemia.
1. Lipid profile modulation
2. Anti-inflammatory activity
Omega-3 fatty acids can reduce the production of pro-inflammatory mediators, which may help slow the progression of atherosclerosis and support overall vascular health.
Evidence from large clinical studies of omega-3 supplementation suggests heterogeneous but potentially clinically relevant benefits, depending on the underlying cardiovascular risk profile of the population studied.
Trials involving patients with established cardiovascular disease or elevated triglycerides demonstrated reductions in recurrent cardiac events, especially when omega-3 therapy was used alongside standard treatments such as statins.
In contrast, studies conducted in lower-risk populations, including individuals without established heart disease, showed limited benefit on major cardiovascular outcomes.
Overall, current evidence suggests that omega-3 supplementation may be most useful in patients with
Although omega-3 supplements are widely used, clinical caution is advised.
Patients should consult a healthcare professional before starting supplementation if they
High doses of omega-3 fatty acids may increase bleeding risk and can interact with other treatments.
Selection of high-quality, purified and independently tested products is also essential to minimise contamination and dosing variability.
Omega-3 supplementation should always be combined with proven lifestyle strategies, including:
Optimal blood pressure and glucose control, along with a healthy body weight, remain central to cardiovascular prevention strategies.
Leading Cardiologist in Gujarat.
Omega-3 fatty acids can play a supportive role in cardiovascular care by lowering triglycerides, modulating inflammation and improving selected vascular risk markers. Their greatest benefit appears in individuals with established cardiovascular disease or significant metabolic risk factors.
They should be viewed as an adjunct to, not a substitute for, evidence-based medical therapy and lifestyle modification. Individualised dosing and suitability should always be guided by a qualified healthcare professional to ensure both safety and clinical benefit.
