Evidence supporting the use of: Fish oil
For the health condition: Heart (weakness)

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Synopsis

Source of validity: Scientific
Rating (out of 5): 4

Fish oil, rich in omega-3 fatty acids (primarily EPA and DHA), is scientifically validated for supporting heart health. Multiple large-scale randomized controlled trials and meta-analyses have demonstrated that omega-3 fatty acids can reduce triglyceride levels, modestly lower blood pressure, decrease the risk of arrhythmias, and have anti-inflammatory effects. These mechanisms contribute to overall cardiovascular well-being. The American Heart Association has recommended fish oil supplementation, particularly for patients with high triglycerides, and suggests that eating fish regularly is associated with a lower risk of heart disease. However, the benefit of fish oil for preventing major cardiovascular events (like heart attacks and strokes) in people without existing heart disease is less clear, with some recent studies showing only modest or no significant benefit in primary prevention. For secondary prevention (in people with established heart disease), some studies, such as GISSI-Prevenzione and REDUCE-IT, have shown a reduction in adverse outcomes, though results can vary based on dosage and population. Overall, while not a cure for “heart weakness” (which is a broad term), fish oil is supported by scientific evidence for certain aspects of cardiovascular support, especially in reducing triglycerides and possibly lowering cardiovascular risk in specific populations.

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