Researchers from Gettysburg College found when individuals took 4 softgels of o3mega extra strength daily for 6 weeks, it led to no overall weight change, but a loss in over 1.1 kg of body fat and a decrease in body fat %. This means o3mega extra strength can improve body composition by increasing lean body mass. Research suggests that these effects may be caused by the omega-3 fatty acids reducing the stress hormone cortisol and by lowering blood pressure.
Noreen E, et al. Effect of supplemental fish oil on resting metabolic rate and body composition in middle-aged adults. Med. Sci. Sports Exerc., 42(5S): 2010 & Journal of the International Society of Sports Nutrition 2010, 7:31