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I just watched your video on eating more fish. Is shellfish (shrimp, lobster, etc.) included when you are speaking of eating more fish?
This is a great question. There is certainly benefit from eating shellfish including crustaceans like shrimp, lobster and crabs. Likewise, mollusks such as oysters, clams and mussels have shown benefit as well. Both crustaceans and mollusks are generally not as high in Omega-3 fats as other seafood. Dark fish including tuna, salmon, sardenes and mackerel are associated with the most benefit. Shrimp, clams and mussels are great choices, also.
There has been some recent evidence that some fresh water fish, including tilapia and catfish, might be lower in Omega-3 fats and higher in Omega-6 fats. It's been shown that the most beneficial ratio is higher Omega-3 with lower Omega-6.
The key with fish and seafood is the same with all ingredients: eat a wide variety. Mix it up. Have tuna, salmon, shrimp, catfish, mussels, halibut and other fish often, eating many varieties frequently.
Thanks for writing,
Timothy S. Harlan, MD, FACP