In a new Australian study, women who reported eating 1 to 2 ounces of beef or lamb a day were half as likely to have major depression or anxiety disorder compared to those who ate less than 1 ounce daily. That may be because beef and lamb in Australia are typically grass-fed, “which means their meat is higher in omega-3 fatty acids, which appear to be protective against anxiety and depression,” says lead author Felice Jacka, Ph.D., of Deakin University’s School of Medicine.