Nutritional value of fish

1, fish contains folic acid, vitamin B2, vitamin B12, vitamin A, iron, calcium, phosphorus and other nutrients, doctors believe that it has a nourishing stomach, diuresis, breast milk, purging and detoxification, stopping coughing the efficacy of the next gas, for a variety of edema, edema, abdominal distension, urinary tract, jaundice, breast milk are all Effective. Eat fish also have liver and blood, skin and hair effects.

2, fish is rich in magnesium, the cardiovascular system has a good protective effect, is conducive to the prevention of hypertension, myocardial infarction and other cardiovascular diseases.

3, fish meat is rich in complete protein compared to red meat. Fish contains a large amount of protein, such as yellowtail contains 17.6%, scallop contains 18.1%, mackerel contains 21.4%, silver carp contains 18.6%, carp contains 17.3%, crucian carp contains 13%. The proteins contained in fish are all complete proteins, and the amount and ratio of essential amino acids contained in proteins are most suitable for the human body's needs, and can be easily digested and absorbed by the human body.

4, fish fat content is low, and mostly unsaturated fatty acids. The fat content of fish is generally low, most of them are only 1% - 4%, such as yellowtail with 0.8%, scallop with 3.8%, mackerel with 4%, silver carp with 4.3%, carp with 5% crucian carp with 1.1% bighead carp (fathead minnow) only 0.9%, cuttlefish only 0.7%. Fish fat is mostly composed of unsaturated fatty acids, unsaturated fatty acids have a longer carbon chain, has the effect of lowering cholesterol.

5, in addition, the fish muscle fiber is relatively short, protein tissue structure is loose, water content is more, therefore, the meat is more tender, and livestock meat compared to eat more feel soft and tender, but also more easily digested and absorbed. Therefore, it can be seen, fish has a high protein, low fat, vitamin, mineral content, good taste, easy to digest and absorb the advantages.

1, tuna fish

Tuna fish in the omega-3 fatty acid content is very high, but it also contains a high level of metallic mercury, eaten more is likely to lead to mercury metal poisoning, not recommended.

2. Catfish

Catfish may be raised in less than ideal conditions, and they may grow in polluted waters containing toxic chemicals and antibiotics.

So, if you choose catfish, it's best to choose catfish raised in a regulated farm or fish pond.

Nutrition of various parts of fish

1. Fish head. Fish head contains a certain amount of EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid), which belong to the omega-3 polyunsaturated fatty acids, which are beneficial to the development of the nervous system and brain of infants. Compared with fish meat, fish head is more likely to be enriched with harmful substances. To get both nutrition and safety, it is recommended to avoid some fish with high mercury content, such as tuna, swordfish and swordfish.

2, fish eyes. Fish eyes have been regarded as good eyesight, which does contain omega-3 polyunsaturated fatty acids conducive to retinal health, but the content is not outstanding, not up to the effect of eyesight. Fish eyes are perfectly fine to eat, but don't expect them to improve your eyesight.

3, fish gills. Fish gills are important respiratory organs of fish, which are rich in iron. This part is also very easy to be contaminated by harmful substances, if you want to eat should also avoid tuna, swordfish and other fish containing high mercury.

4, fish skin. Fish skin has a creamy texture and is a favorite of many people, but rumors that fish skin is easily contaminated by heavy metals also worry many people. There is no experiment to show that all fish skin has heavy metal pollution. In short, fish skin can still be eaten, the key is to choose a small pollution of fish, such as small yellow croaker, fall swordfish, scallops, Spanish mackerel and so on.

5, fish scales. Legend has it that fish scales are rich in collagen, can beauty. In fact, collagen is not a high-quality protein, eaten will be digested and decomposed into amino acids or "peptides", and will not directly in the form of collagen on the face. Therefore, eating collagen can only increase the supply of amino acids at most, and not beauty. Of course, if you like its taste, you can eat it.

6, fish spines. Fish spines are rich in calcium and other trace elements, but if eaten directly, the body can absorb and utilize a particularly small amount. To get the nutrients in the fish spines, you can add vinegar to the soup, simmer over low heat (2 to 4 hours).

7, fish roe. Fish roe contains a considerable amount of lecithin, which is helpful for the development of the nervous system. But lecithin is also a kind of fat, so it is easy to get fat if you eat too much. It is recommended that you eat to control the amount, so as not to increase the risk of obesity.

8, fish bladder. Fish swim bladder is also called flower glue, it is the organ that allows fish to lift freely in the water. Legend has it that swim bladder has the effect of promoting lactation, nourishing yin and blood, beauty and skin care, etc., in fact, they are all false. Fish bladder is also rich in collagen, if you like to eat, you can wash it with water, and fish with stew or braised.

9, fish gall. Folklore has always been a fish gallbladder eyesight legend. In fact, not only can the fish gall bladder not brighten the eyes, many fish gall bladders are poisonous, eating will be poisoned, even life-threatening, common grass carp, carp, pangasius, mackerel, crucian carp, silver carp and so on.

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