How to Eat Tuna Safely and Nutritiously

Tuna is an oceanic migratory fish that is widely distributed in the Pacific Ocean, Indian Ocean and Atlantic Ocean. Tuna swims from the eastern part of the ocean to the western part of the ocean and travels up to tens of kilometers. The instantaneous speed can reach 160 km/h. Due to its high activity and its activities in the deep sea of ​​200 to 500 meters, tuna is not subject to environmental pollution, and is a rare deep-sea species. It is also an internationally recognized green aquatic product.

There are 16 species of tuna, including bluefin tuna, tuna tuna, bigeye tuna, yellowfin tuna, albacore tuna, blackfin tuna, and squid, which are used for raw food, canned food, smoked products, and cooked foods. Striped four-finned swordfish, swordfish, Indian gun fish, blue marlin, white four-finned swordfish, flat fin swordfish, umbrella sailfish, four-finned swordfish, four-finned swordfish with scales, and blue-green tuna. Among them, four species of bluefin tuna, tuna tuna, bigeye tuna, and yellowfin tuna are the main raw fish species, albacore tuna and tuna are mainly based on canned raw materials, and other species are generally used as cooked food.

Delicious and nutritious According to the analysis, China's tuna has the following characteristics: 1 delicious taste, excellent taste. The most valuable tuna is a bluefin tuna. This tuna is a large tuna, which can grow up to 4 meters in length and weigh more than 500 kilograms. It has a distinctive flavor and taste. 2 The protein content is very high. For example, tuna and tuna can contain 500mg/kg protein, bluefin tuna and tuna can reach 4000mg/kg. 3 is rich in "brain gold." Tuna contains a lot of DHA and EPA. 5 The cholesterol content is very low. Tuna is 7 to 14 times lower in cholesterol than pork, chicken, and beef. Visible, tuna is a high-protein, low-fat, low-calorie healthy food, beneficial to enhance liver function, improve resistance, reduce blood pressure and blood lipids, prevent arteriosclerosis.

The method of eating raw tuna is to use fresh or fresh-keeping tuna fish, cut into thin slices and mix seasonings such as mustard and soy sauce.

The concentration of heavy metals (such as mercury) in tuna less polluted tuna in China is related to whether or not the sea environment is contaminated. In the contaminated waters, the longer the tuna grows, the heavier the body weight, and the more mercury in the body. Recently, we selected samples of yellowfin tuna and Guangdong chilled yellow fin tuna in the deep sea of ​​Yantai, Shandong Province. The highest mercury content was 0.71 mg/kg, and the minimum mercury content was 0.035 mg/kg, with an average of 0.43 mg/kg. At present, the raw tuna marketed in China is mostly yellowfin tuna and bigeye tuna, and the whole tail body weight is generally 20 to 50kg, and the mercury content is far below the safety index of 1.0mg/kg.

How many can eat each day China's "raw tuna standard" with reference to international standards, on the methyl mercury in the tuna products (Hg) with ≤ 1.0mg/kg control. According to the theoretical calculations, 50g of tuna sashimi can be eaten per person per day. Shanghai Fisheries University professor Wu Jiale