Herring, salmon or mackerel are a must, according to Lars-Erik Litsfeldt, author of Diabetes, No Thanks (Scandinavian Diet).
Rich in protein and other nutrients and low in calories, fish is filled with omega-3 fats, which serve as an anti-inflammatory and balance omega-6 fats. People generally get 15 times more omega-6 than omega-3 according to Litsfeldt. “The ideal amount would be close to a 1:1 ratio of omega-6 and omega-3,” he explains. “It might be bad to eat something that contains inflammatory fat, but we still need some. It's used when the body defends itself from intruders.”