A nutritionist explains the health benefits of fish and whether everyone can eat it.

Contents:

• What are the benefits of fish
• What role do omega-3 fatty acids play in health?
• What are the risks associated with eating fish?
• How to determine the quality of fish when buying
• How to cook fish properly
• How to store fish properly

The benefits of fish

Fish is an important food for the human body. Not only is it rich in protein and healthy fats, but it also serves as a valuable source of vitamins and minerals. In particular, fish contains omega-3 fatty acids, which help improve heart and vascular function and support brain health. In addition, fish is a source of vitamins D and B12, necessary for the normal functioning of the body. Eating fish in your diet helps strengthen the immune system, improve vision, and maintain healthy skin. Including fish in your daily menu is a step toward a more balanced and healthy diet.

• B vitamins, including B12, which is important for the nervous system and the formation of red blood cells, which distribute oxygen throughout the body.
• Vitamin D, which is necessary for maintaining healthy bones and the immune system. Salmon and mackerel are especially rich in this vitamin.
• Calcium and phosphorus, which are necessary for the development of the musculoskeletal system and the prevention of osteoporosis.
• Selenium and iodine, which ensure the functioning of the thyroid gland.

The chemical composition of fish meat varies depending on the fish species, habitat conditions, physiological state, age, and gender. These factors significantly affect the nutritional value and quality of the fish product. The diversity of fish species and their ecological niches determine the content of proteins, fats, vitamins and minerals, which makes fish an important source of nutrients for humans.

• Among the lean fish species, pike perch, burbot, and river perch have the richest chemical composition.
• Among the fish of medium fat content are roach and crucian carp.
• Among the especially fatty fish are pink salmon, Amur chum salmon, and Siberian nelma.

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Vitamin D: Norms and Deficiency

Vitamin D plays a key role in maintaining human health. It promotes the absorption of calcium and phosphorus, which are necessary for the normal functioning of the skeletal system. Vitamin D requirements vary depending on age, gender, and level of physical activity. Adults are recommended to get 600 to 800 international units (IU) of vitamin D per day.

Vitamin D deficiency can lead to serious health problems, including osteoporosis, a weakened immune system, and an increased risk of chronic diseases. Signs of deficiency may include fatigue, muscle aches, and frequent colds. To prevent deficiency, it's important to include vitamin D-rich foods in your diet, such as fatty fish, egg yolks, and dairy products, and consider taking supplements. Proper vitamin D levels promote not only physical but also mental health. Regular testing and monitoring of vitamin D levels will help avoid deficiency and maintain overall health. Seafood such as cod, haddock, herring, flounder, and sardines are among the most valuable foods due to their high content of omega-3 fatty acids. These healthy fats promote cardiovascular health, strengthen the immune system, and have anti-inflammatory properties. Including seafood in your diet helps improve overall health and maintain normal cholesterol levels.

What role do omega-3 fatty acids play in health?

Omega-3 polyunsaturated fatty acids (omega-3 PUFAs) are essential substances that cannot be synthesized in the human body and must be obtained from food. These acids play a key role in the formation of cell membranes, maintaining normal triglyceride levels in the blood, and in promoting heart health and preventing cardiovascular disease. The main source of omega-3 in the human diet is fish, especially fatty varieties such as salmon, mackerel, and herring. Regular consumption of foods rich in omega-3 fatty acids can significantly improve overall health and reduce the risk of developing various diseases. Research confirms that increased fish consumption, and consequently omega-3 polyunsaturated fatty acids (PUFAs), significantly reduces the risk of sudden death in patients who have had a myocardial infarction. Omega-3 fatty acids also help improve survival in heart failure and have an antiarrhythmic effect. Including fish in the diet may be an important strategy for improving cardiovascular health and preventing serious complications.

Eating at least 35 grams of fish per day helps prevent cardiovascular disease and reduces the risk of death from coronary heart disease by 50%. Regularly adding fish to your diet can significantly improve cardiovascular health, thanks to its beneficial omega-3 fatty acids and other nutrients. Including fish in your daily diet is a simple and effective way to improve overall health and reduce the risks associated with cardiovascular disease.

Omega-3 fatty acids can be obtained not only from fish, but also from seeds, vegetable oils, and nuts. This raises an important question: is it possible to live without fish in your diet? Theoretically, it is possible. However, when we talk about nutritious foods, we should consider more than just one component, such as omega-3. Fish contains many other beneficial substances for which there is not always an equivalent replacement in plant sources. Therefore, when eliminating fish from your diet, it is important to carefully plan your meals to ensure you are getting all the necessary nutrients.

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Nuts: benefits and harms

Nuts are nutritious and healthy foods that can significantly enrich the diet. They contain many vitamins, minerals, proteins and healthy fats, which makes them an important part of a healthy diet. The benefits of nuts include their ability to lower cholesterol, support cardiovascular health, and improve brain function. For example, walnuts are rich in omega-3 fatty acids, which help improve memory and concentration.

However, despite all the benefits, nuts can also have some disadvantages. They are high in calories, which can lead to weight gain if consumed in excess. In addition, nuts can cause allergic reactions in some people. Therefore, it is important to eat them in moderation and take into account individual characteristics.

Including nuts in your daily diet can bring many benefits if you follow the recommendations for quantity and variety. Choosing the right nuts and consuming them in moderation will help you get the most out of this valuable product while maintaining your health.

What are the risks associated with eating fish?

Yes, there are risks. However, this is not a reason to completely eliminate fish from your diet. In this article, we will discuss the steps you can take to minimize potential harm and safely include fish in your daily menu.

Fish can contain parasites that can cause liver and bile duct problems in humans. To reduce the risk of infection, it is important to purchase fish only from reputable and certified stores. Choosing trusted suppliers and following proper storage and preparation procedures will help protect your health.

Heat-treated fish is a safer option than raw fish. It is important to note that heat-treated fish also includes flash freezing, which is used to preserve the freshness of fish during transportation from the fishing site to the end consumer. Therefore, favorite dishes such as sushi, rolls, and poke bowls can also be safe if a restaurant purchases fish from certified suppliers rather than from the black market. Eating properly processed fish reduces the risk of foodborne illness, making such dishes not only delicious but also safe for health.

River fish is the most common carrier of helminths. However, it is worth noting that such fish is often sold frozen, which significantly reduces the risk of infection. In addition, raw fish is rarely included in most people's diets, which also reduces the likelihood of parasite transmission.

For increased safety, it is recommended to purchase fish from artificial reservoirs. These are aquaculture species, such as salmon, sturgeon, and carp. Their farming process is fully controlled, which significantly reduces the risk of parasite infection compared to sea and river fish. Thus, aquaculture fish is the safest option among raw foods.

Pregnant women and children are strongly advised to avoid raw fish and seafood, including raw oysters, clams, and scallops. These products may contain dangerous bacteria and parasites. A healthy adult can fight off these microorganisms, but the weakened immune systems of pregnant women and children are not always able to protect the body from potential threats. Nutritional safety during this period is especially important for the health of mother and child.

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Parasite infection is possible from eating poorly salted fish. Furthermore, it is worth noting that even lightly salted fish contains a significant amount of salt, which can negatively impact the heart, kidneys, and liver, as well as overload the circulatory system. Therefore, it is recommended to avoid such foods to maintain good health.

Smoked fish can pose a health risk due to the high levels of food additives used in the smoking process, as well as carcinogens such as benzopyrene. This dangerous component can accumulate in the body and, over time, contribute to the development of cancer and tumors. Moderate consumption of smoked fish and awareness of potential risks will help maintain health.

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Salt: Benefits, Harms, and Intake Standards

Salt is an important part of the human diet; it not only adds flavor to dishes but also performs many vital functions in the body. The main component of salt is sodium, which plays a key role in maintaining water-salt balance and normalizing blood pressure. In addition, sodium is involved in the transmission of nerve impulses and muscle contractions.

However, excessive salt consumption can lead to negative health consequences. Excess sodium in the diet is associated with an increased risk of hypertension, cardiovascular disease, and kidney dysfunction. Therefore, it is important to monitor salt intake and follow recommendations for its use.

According to recommendations from the World Health Organization, adults should limit salt intake to 5 grams per day, which is equivalent to one teaspoon. This will help reduce the risks associated with excess sodium consumption and maintain overall health.

It is important to remember that salt is found not only in overtly salty foods, but also in many prepared and processed foods, such as sausages, cheeses, and canned goods. Therefore, monitoring salt intake should be comprehensive and consider all sources of sodium in your diet.

In conclusion, salt is an important nutrient, but its consumption should be moderate. Knowing the benefits and harms of salt can help you better manage your health and avoid potential negative consequences.

Fish accumulate mercury as a result of ocean pollution caused by industrial emissions. Long-lived fish species tend to accumulate more mercury than those with shorter lives. To reduce the risk of consuming fish with high mercury levels, it is recommended to familiarize yourself with the list of safe fish species.

Safe fish with low mercury levels is an important element of a healthy diet. Fish that contains minimal levels of mercury is not only healthy but also provides essential nutrients. Choosing fish with low mercury levels helps reduce the risk of toxic exposure, which is especially important for pregnant women and children.

Such fish include salmon, cod, herring, and sardines. These fish are rich in omega-3 fatty acids, which support cardiovascular health and promote normal brain function. Eating safe fish can improve overall health and reduce the risk of various diseases.

It's important to pay attention to the source of your fish, choosing products caught in ecologically clean waters. This will help ensure that the fish is free of harmful substances and will provide maximum health benefits. Including safe, low-mercury fish in your diet is a simple and effective step to improving your diet and overall health.

• Anchovies
• Atlantic mackerel
• Cod
• Sardines
• Salmon
• Mackerel
• Flounder
• Hake
• Freshwater trout
• Shrimp
• Tilapia
• Whitefish
• Bass
• Sea bass
• Oysters

Moderately high mercury fish are foods to be consumed with caution. Fish that contain moderate amounts of mercury may have adverse health effects, especially when consumed frequently. Examples of such fish include tuna, swordfish, and some types of mackerel. It is recommended to limit their consumption, especially for pregnant women and children, as mercury can have a harmful effect on the nervous system. It is important to choose fish that has been tested for toxic substances to minimize health risks. Moderate consumption of safe fish rich in omega-3 fatty acids can be beneficial, but remember the importance of a balanced diet and variety.

• Grouper
• Halibut
• Mackerel (Spanish)
• Bass (striped, ocean)
• Sea bass
• King mackerel
• Tuna (albacore, white tuna, canned and fresh/frozen)
• Carp
• Sea bass (Chilean/Patagonia)
• Mackerel (Atlantic)
• Burbot (northern)

Hazardous fish species with high mercury levels pose a serious threat to human health. Consuming such fish can lead to mercury poisoning, which is especially dangerous for pregnant women, children, and people with weakened health. Among the most dangerous fish include shark, swordfish, king mackerel, and tuna. These species accumulate mercury in their tissues due to pollution of water bodies and the food chain. To minimize the risks, it is recommended to limit the consumption of these fish and choose safer alternatives, such as salmon, cod, and anchovies, which contain significantly less mercury. When purchasing fish, it is important to pay attention to its origin and the level of toxic substances. Healthy eating should remain a priority, and awareness of potential risks will help maintain health and avoid negative consequences.

• King mackerel
• Marlin
• Swordfish
• Shark
• Bigeye tuna
• Orange roughy

Fish is an important element of a child's diet, as it contains healthy fats and fat-soluble vitamins that contribute to the proper development of the skeletal system, strengthening the immune system, and the formation of the nervous system. Including fish in children's diets helps provide them with essential nutrients, which is especially important during periods of active growth. Regular fish consumption can have a positive impact on a child's overall health and development.

Fish is not recommended as a complementary food before nine months of age, as it can be a potential allergen. From 10 months, lean white fish, such as cod or hake puree, can be added to a baby's diet. This will help diversify the menu and provide the child with the necessary nutrients.

How to determine the quality of fish when buying

It is important to consider several key aspects:

• Smell: fresh, characteristic fishy smell without signs of decay or acidity.
• Gills: light or deep red, without mucus.
• Eyes: transparent, clean, bulging.
• Carcass: has smooth, shiny, tightly adjacent scales.
• Abdomen: not swollen.

To determine the freshness of uneviscerated fish, you need to press on its belly. When pressed, there should be no dents or marks. If you place a fish on your palm, a fresh fish will lie flat, while a spoiled fish will have a drooping head and tail. You can also check the freshness by placing the fish in water: fresh fish will begin to sink, while spoiled fish will remain on the surface.

How to cook fish properly

• Frying: at a temperature of 60-70 °C, which allows you to preserve the maximum amount of nutrients.
• Boiling: at a temperature of 100 °C, which also ensures the preservation of nutrients.
• Baking: in foil at a temperature of 180-200 °C, it is recommended to use a minimum amount of fat.

How to store fish properly

After purchase, fish should be stored in the refrigerator at a temperature of 0-4 °C, consume it within 1-2 days. If you plan to store fish for a longer period, it is recommended to freeze it at -18°C or below. Proper storage will ensure its freshness and preserve its nutrients.

Repeated freezing of meat is not recommended. Repeated freezing disrupts its structure, as the water in the fish turns to ice and damages the tissue. This negatively affects the molecular structure, resulting in the destruction of proteins and vitamins. These changes significantly reduce the nutritional value of the fish, making it less healthy. Therefore, it is important to properly store and use frozen foods to preserve their quality and nutritional properties.