The scientists at Columbia University Medical Center have proven this fact, yet again. The Director at Columbia Institute of Human Nutrition, Dr. Richard Deckelbaum, says that a diet rich in fish oils can prevent fat accumulation in the aorta, the main artery leaving the heart.
Fish oil helps by blocking cholesterol build-up in the arteries, due to the presence of high levels of Omega-3 fatty acids. These Omega-3 fatty acids also lower triglyceride levels, and inhibit entry of LDL (low density lipoprotein or bad cholesterol) into the arteries, and hence, much lower levels of cholesterol gets collected in these vessels. The scientists attribute this fact to the ability of fatty acids to considerably decrease lipoprotein lipase, a molecule that traps LDL in the arterial wall.
However, scientists believe that the source of fish oil should preferably from the body of fish, and not the liver. This is because liver and liver products of fish contain active forms of Vitamin A, apart from Omega-3, which if present at high levels could be dangerous.
However, consuming fish oil directly from its source, by eating sardines, salmon, tuna and other so-called cold water fish seems to protect against clogged arteries.
Besides regulating cholesterol, fish oil helps by preventing mental illness and delaying onset of illness associated with age, and its anti-inflammatory properties.
To derive these health benefits, people can either increase fish intake or use supplements containing long-chain fatty acids DHA and EPA, usually found in cold water fish, Dr. Deckelbaum concludes.