researchers call the gold standard is whether or not omega-3 is all they re cracked up to be. dr. marti mccreery, physician and professor of public health at john hopkins hospital. doctor, this study done by the cochran review is looking at mental health in a specific group of people but what does it really tell us about omegas? jenna, a lot of people take omega-3s because of the heart benefits. it is exaggerated to say it has been good for your brain health. people thought it prevents alzheimer s and increases your memory. this study, the largest study of aggregated studies in patients show that is not really true. the brain health benefits are really not there. jenna: what about the other benefits? we re really told that owe if i can get it out, omega-3 are great when it comes to cancer, when it comes to your skin, when it comes to so many different things. so are there areas where omega-3s are still something someone should consider taking? the cancer benefit and