The liver regulates cholesterol and blood sugar and is important for fat metabolism. Increasing unhealthy lifestyles are raising incidence of lover disease, often leading to death. Researchers have found that omega-3 fatty acids can repair a damaged liver, especially in overweight people if the supplement contains DHA. DHA can stop the progression of nonalcoholic steatohepatitis, a condition that can progress to cirrhosis and even liver cancer. DHA can be found in supplement form and in food, especially oily fish.