Don’t let a mercury scare keep you from eating fish, says William Lands, Ph.D., formerly with the National Institutes of Health and a leading expert on the benefits of fish oil. He says virtually all fish, even those high in mercury, are safe. “Mercury is toxic in the absence of selenium,” Lands says, “but fish is loaded with selenium that neutralizes the danger.” A new University of North Dakota study shows that common fish, including grouper, swordfish, tuna and salmon, have much more selenium than mercury. Even albacore tuna (high on the government’s hit list) has 15 times more selenium than mercury, making it perfectly safe, in Lands’ view. Is there any fish Lands would avoid because of high mercury? No, except maybe the pilot whale, not seen in U.S. markets.