Fresh sea tuna is rich in protein and other valuable substances. However, canned tuna has become more popular due to its availability and long shelf life.
Benefits of Canned Tuna
Canned tuna, like fresh fish, is rich in various micronutrients. It contains potassium, which helps maintain bone and muscle health, magnesium, necessary for energy production, vitamin D, which supports the immune system, as well as B vitamins that are beneficial for the nervous system and skin. These vitamins also participate in the formation of new red blood cells, which helps prevent anemia.
Tuna meat contains almost no carbohydrates but is rich in dietary protein, which covers about 50% of the daily requirement for this important macronutrient.
The omega-3 fatty acids found in tuna help lower levels of “bad” cholesterol. Therefore, nutritionists recommend including fish in the diet twice a week, which can reduce the risk of cardiovascular diseases.
According to a study by American scientists involving 40,000 people aged 45 to 84, canned tuna is also beneficial for eye health. The high content of fatty acids helps reduce the risk of dry eye syndrome and contributes to the overall health of the retina and eyes.
Harms and Contraindications
Unfortunately, every product has its contraindications. The main issue with tuna is the presence of mercury, which enters the fish due to water pollution. However, it is worth noting that the content of this heavy metal varies depending on the type of tuna. Since canned products are made from young and small fish, the mercury level in them is lower than in fresh or frozen fillets.
To extend the shelf life of canned tuna, a significant amount of salt, spices, and other additives are included. Therefore, excessive consumption can lead to bloating and problems with fluid regulation in the body.
Packaging Issues
The quality of the product can also deteriorate due to the can itself. Some types of packaging may contain residues of bisphenol A—a chemical used to coat the can's walls to prevent corrosion and degradation.
Always check the packaging for dents, dirt stains, cracks, and bulges. If you notice such defects, it is better to refrain from purchasing to avoid potential poisoning.
Source: dietology.pro
