Omega-3 fatty acids improve protein metabolism in older adults...

Omega-3 fatty acids, found in fish oil, are among the most popular supplements on the planet. People use them to prevent premature death, improve cardiovascular health and prevent cancer, but little scientific research supports these effects.

Omega-3 fatty acid supplements protect people with a history of cardiovascular disease from heart attacks and sudden cardiac death. They may also promote mental health by preventing depression and inflammation in the brain. Furthermore, omega-3 fatty acids could prevent muscle loss in old age.

Scottish scientists administered six grams of fish oil per day or a placebo (fake fish oil) to older adults over a period of nine months. Omega-3 fatty acids promoted muscle protein synthesis and helped older people to maintain their muscle mass, but they had no effect on blood sugar regulation.

(British Journal of Nutrition, published online on November 5, 2015)