The nutritional value of tuna

1. Most of the fatty acids in fish are unsaturated fatty acids, which contain complete amino acids, vitamins, mainly Vb12, rich minerals and trace elements such as iron, potassium, calcium and iodine, so it is a rare healthy food;

2. DHA contained in tuna is the most in fish, which is an essential nutrient for the development of brain and central nervous system;

3. Tuna also contains a lot of EPA, which can inhibit the increase of cholesterol and prevent arteriosclerosis, and has a special role in preventing and treating cardiovascular and cerebrovascular diseases.

4. Regular consumption of tuna can remove excess salt in the body, balance the water content in the body, and maintain the normal water index.

5. Tuna is low in fat and calories, rich in high-quality protein and rich in DHA, EPA, Omega-3 fatty acids, taurine, potassium, vitamin B12 and other nutrients. DHA plays an important role in brain function development and memory enhancement, while EPA can inhibit the increase of cholesterol and prevent arteriosclerosis, and also plays a special role in preventing and treating cardiovascular and cerebrovascular diseases.

Conclusion:

1. The most outstanding value of tuna for pet dogs lies in its rich DHA&; EPA and DHA are called Docosahexaenoic Acid in Chinese and docosahexaenoic acid in English, so they are abbreviated as: DHA, whose melting point is-44℃ and boiling point is 447℃. In the early days, these products were mostly made from deep-sea fish oil (usually tuna oil) rich in DHA and EPA by molecular distillation process, and existed in the form of a mixture of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). We At present, the most advanced product is made from marine microalgae rich in DHA and without EPA through fermentation process. DHA can promote the function, growth and development of pet dogs' brains. DHA is an important component of brain cell membrane, which is involved in the formation and development of brain cells, and plays an important role in the extension of axons and the formation of new processes of nerve cells, which can maintain the normal physiological activities of nerve cells and participate in the formation of brain thinking and memory. DHA also has anti-aging effect on pet dogs. Studies show that with aging, the content of DHA in platelets and erythrocyte membrane lipids decreases, and the activity of SOD decreases. Adding DHA to dog food is helpful to increase DHA content and SOD activity in erythrocyte membrane lipids. Studies have also shown that DHA has antioxidant and anti-aging effects. DHA can improve blood circulation, inhibit platelet aggregation, prevent thrombosis, reduce blood viscosity, improve blood circulation and lower blood pressure. Can be used for preventing and treating cerebral thrombosis and arteriosclerosis obliterans of lower limbs. DHA can reduce serum total cholesterol and low-density lipoprotein cholesterol, and increase high-density lipoprotein cholesterol, which can treat hyperlipidemia and atherosclerosis. DHA can antagonize allergic reactions, prevent and treat allergic dermatitis and bronchial asthma, and relieve rheumatoid arthritis. It can improve retinal reflex function and prevent visual impairment; Can reduce neutral fat in liver and prevent fatty liver; It has anticancer effect, can lower blood sugar and relieve diabetic symptoms.

EPA is called Eicosapentaenoic Acid in Chinese and eicosapentaenoic acid in English. EPA is one of several commonly used ω-3 fatty acids. The main source of omega-3 fatty acids is cold-water fish, such as wild salmon. Fish oil supplements can also improve the concentration of EPA in the body. The first purpose of EPA is to make up for the autoimmune deficiency of pet dogs. Omega-3 fatty acids in fish oil have been proved to reduce harmful immune response and are effective in treating inflammation caused by autoimmune deficiency. Secondly, it can ensure the health of the dog's circulatory system. Omega-3 fatty acids have been proved to promote the health of the circulatory system and prevent cholesterol and fat from accumulating on the arterial wall. It is very necessary to promote the growth and development of pets and keep the omega-3 fatty acid content in the body in an appropriate balanced position for normal growth and development. The food sources for pets to obtain EPA are wild salmon, mackerel, sardines and herring. Or you can add fish oil to the dog food formula, because EPA also exists in fish oil.

These are unsaturated fatty acids necessary for pet dogs. Fatty acids other than saturated fatty acids, fatty acids without double bonds become saturated fatty acids, and all animal oils are unsaturated fatty acids. Unsaturated fatty acid is a kind of fatty acid that constitutes the body fat and is essential for pet dogs. Unsaturated fatty acids are divided into monounsaturated fatty acids and polyunsaturated fatty acids according to the number of double bonds. Among food fats, monounsaturated fatty acids are oleic acid, and polyunsaturated fatty acids are linoleic acid, linolenic acid and arachidonic acid. Pets generally can't synthesize linoleic acid and linolenic acid, so they must be supplemented from the diet. According to the position and function of double bonds, polyunsaturated fatty acids are divided into ω-6 series and ω-3 series. Linoleic acid and arachidonic acid belong to ω-6 series, while linolenic acid, DHA and EPA belong to ω-3 series.

2. The demand of pet dogs for vitamin B12 is limited, so although tuna is rich in B12, it is not of great value to pet dogs.

3. As for the explanation that tuna can remove excess salt in the body, balance the water content in the body, and ultimately reduce tear marks, the reason for the increase of tear marks in pet dogs is nothing more than the abnormal lacrimal gland of dogs, which leads to the increase of tears due to excessive secretion of tears; Abnormal nasolacrimal duct and poor drainage of tears lead to tears flowing out from the inner corner of the eye. At the same time, the dog's tears are a kind of weakly alkaline transparent liquid, of which 98.2% is water, and the rest is a small amount of inorganic salts and protein (the salt content in the pet's tears is .2%~.6%), as well as lysozyme, oleoamide, immunoglobulin A, complement system and other substances. The reddish-brown color generally left on the dog's face is the substance left over after the water evaporates. Because tuna can remove excess salt in the body and balance water in the body, pet food containing tuna has a certain auxiliary effect on reducing tear marks. However, excessive tear marks or heavy tear marks are mainly caused by abnormal lacrimal glands and excessive secretion of tears, which is an endocrine imbalance phenomenon. In addition, 2%-3% of dogs' tears increase due to congenital reasons, and those with serious exophthalmos are prone to be squeezed. Therefore, the relief effect of tuna tears is only an auxiliary effect, and it cannot be dependent on tuna food formula.

To sum up, tuna, as a healthy food source, plays an obvious positive role in supplementing unsaturated fatty acids, improving pet skin health, promoting the brightness of coat color, increasing true protein, improving brain nerve development, and making pet dogs smarter. At the same time, it also plays a certain auxiliary role in improving pet dogs' immunity, supplementing amino acids and vitamins, reducing tear marks and reducing cardiovascular diseases.