Our expert says:
Any food, no matter how healthy (and fish is extremely healthy food because it is rich in vitamins, minerals and omega-3 fatty acids) or tasty, can make you gain weight if you eat too much of it. There is also the problem that raw fish contains a so-called anti-nutrient which interferes with the absorption of vitamin B1. Thus I would say by all means eat sushi and shashimi in moderate quantities, but not all the time. A varied diet that includes all kinds of different foods is always the best option and one should not concentrate on only one or two types of food.
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