1, precautions for eating fish
(1) Don't eat fish that are too red or too white.
Because of the different kinds of fish, there are red-fleshed fish such as tuna and white-fleshed fish such as hairtail, but if the color of fish is too bright red or bright white, it is probably the "credit" of dyes.
(2) Pick the "Big Eight"
The size of a fish determines its taste and safety. Too small, the fish has not grown up and matured, the meat is not tender enough, and fishbones will come out. Too big means that the fish is old and the meat is rough, and many harmful substances may accumulate in the body. Therefore, it is more appropriate to buy fish with the size of "eight points". For example, 1.5 kg is suitable for carp and Wuchang fish, 0.5 kg ~ 1 kg for crucian carp and 4~5 kg for grass carp.
Don't buy those with cloudy eyes and gray cheeks.
When buying "chilled fish", you should first observe its eyes and gills. Fresh fish have full eyeballs, clear corneas and bright gills. Secondly, the eyeball of fresh fish is not full, the cornea is wrinkled and slightly turbid, and sometimes the bleeding in the eye is red, and the gills are dark gray-red or gray-purple. Rotten fish eyes collapse or shrivel, cornea atrophy or rupture, gills are brown or grayish white.
(3) Kill the live fish now and put it before eating.
Some people think that the fresher the fish, the better, so they like to kill it as soon as they catch fresh fish. In fact, there are still some toxic substances left in this wild fish. The quality of freshly slaughtered fish is not the best, because fish will have a process of "acid discharge" and it will take some time to be more delicious. Small fish such as grass carp and silver carp should be refrigerated immediately and cooked after 2 hours; Big fish need to be refrigerated for more than 2 hours.
Don't choose the wrong color of water in the tank.
Buying live fish in the supermarket depends on the "water color". Because it reflects the quality of water, if it is dark green or blue, it may be that there are too many algae, which means that the water has not been changed and the water tank has not been cleaned for a long time, which may affect the health of fish. The fish in a clear and flowing water tank are generally more vivid.
(4) Eat sashimi after freezing.
With the rise of Japanese cuisine, sashimi has also begun to have a broad market. In fact, many sashimi contain a parasite called liver blood sucking worm, which can easily lead to liver disease if eaten too much. This parasite has poor heat resistance and low temperature resistance, and can be killed by freezing at MINUS 20℃ for 24 hours, but the ice under the sashimi plate can't kill this parasite at all. Therefore, fish can only be eaten raw when the source of raw materials is sufficient.
(5) Try steaming.
Among all cooking methods, steaming is the healthiest, with lower cooking temperature and less oil, which can protect most nutrients in fish from being destroyed. Whether boiled or stewed, some nutrients in fish may be lost in soup. The high temperature of barbecue is easy to produce harmful substances, and the amount of oil used in grilled fish is also quite large, which destroys the low-fat health characteristics of fish. Frying is not recommended because of its high oil content, which is more harmful to fish nutrition.
(6) Don't buy if the price is too low.
The price is ridiculously low, and the source, quality and safety of fish should be considered. Eating spoiled fish will bring great health risks.
(7) Don't eat salty food.
Aquatic products may contain a lot of nitrite. In the process of drying or curing, some protein will decompose to produce amines, which will combine with nitrite to form nitrosamines, which has a certain cancer risk.
(8) Don't eat fish on an empty stomach
Fish contains a lot of purines, which need to be decomposed by rice (that is, carbohydrates). If you eat fish on an empty stomach, the purine content in your body will increase, and the acid-base imbalance will aggravate or lead to ventilation.
(9) Don't eat fish gall
Some folk remedies believe that fish gall has the effect of clearing heat and detoxifying, but if eaten raw, it will lead to poisoning, which may lead to liver and kidney failure.
Know where to eat and where not to eat.
According to scientific investigation, the mercury content of a fish is that the head is bigger than the skin, and the fish is bigger than the fish eggs. So it's best to eat less fish head and skin.
Bian Xiao concluded: Fish is delicious and nutritious, suitable for all ages. Many people like to eat fish, but housewives must remember these precautions when eating fish, so that eating fish can give full play to its nutritional value and ensure the health of their families.
2. The efficacy and function of grass carp
Grass carp is sweet, warm and non-toxic, and enters the liver and stomach meridians; Has the effects of warming stomach, regulating middle energizer, suppressing hyperactivity of liver, suppressing yang, expelling wind, treating arthralgia, stopping malaria, benefiting intestine and improving eyesight; Indications: physical weakness, wind deficiency, headache, hyperactivity of liver yang, hypertension, headache and chronic malaria.
1. Grass carp is rich in unsaturated fatty acids, which is beneficial to blood circulation and is a good food for cardiovascular patients;
2. Grass carp is rich in selenium, which has anti-aging and beauty effects if eaten regularly, and also has certain preventive and therapeutic effects on tumors;
For people with weak body and poor appetite, grass and fish are tender but not greasy, which can stimulate appetite and nourish.