Unlike canned tuna, fresh tuna is rich in health-promoting omega-3 oils. In addition to their proven heart benefits, these oils can alleviate inflammatory conditions such as rheumatoid arthritis and joint stiffness. One weekly serving of oily fish, such as herring, salmon, mackerel, or fresh tuna, provides your daily requirement. What better way could there be to get those all-important omega-3 oils? Arrange strips of lightly seared tuna next to a lemony bean salad infused with garlic and basil for a tangy lunch or starter. Here's a great recipe for enjoying the incredible nutrients found in tuna.