Are semi-finished products healthy?

Semi-finished products are unhealthy. Health hidden dangers of semi-finished dishes in life, many people want to enjoy food and be lazy, and semi-finished products have become the best choice. Are these semi-finished dishes nutritious? Are there any health risks? Behind the convenience, there are some problems with semi-finished dishes. Semi-finished dishes often put a variety of foods with different properties and different storage conditions in the same carton, which may have the problem of odor. For example, when fish, shrimp and vegetables are mixed together, food quality supervision will have a bad taste and the taste will be greatly reduced. The raw materials of pork, beef and other meat dishes are processed after frozen storage, and the flavor volatilizes and the taste loses a lot. Fresh fish tastes delicious and tender, while semi-finished fish often has a fishy smell. This is because after freezing, the fish will be more fishy and the texture will be worse. In the process of storage, transportation, processing and repeated cooking, some vitamins are destroyed and lost, and many semi-finished vegetables will produce nitrite if seasoned.