Non-staple food is non-essential food except staple food. This kind of food can supplement energy, various trace elements, vitamins, cellulose and so on. Its nutrition is different, and its effect on human body is also different.
There are many kinds of non-staple food, such as meat, eggs, milk, poultry, fish, beans and vegetables. Their nutritional functions are also different. Animal foods and beans such as meat are rich in protein and fat, but lack vitamins and inorganic salts, especially vitamin C. Vegetables contain very little protein, but are rich in vitamins and inorganic salts, and some vegetables are rich in vitamin C. If all kinds of non-staple foods are eaten together, we can learn from each other's strengths and make up for each other's shortcomings, and the human body can obtain more comprehensive nutrients.
Attention should be paid to when selecting non-staple food
Rejecting "three no" products, the so-called three no products, refers to no production date, no quality certificate, no manufacturer; In addition, we should also pay attention to the shelf life. Often, discounted products are close to the shelf life. If you buy them, you should keep in mind the date to avoid expiration and deterioration.
Look at the addition of preservatives, snacks from the production, transportation and other processes, and finally to the hands of consumers. Therefore, in order to ensure the quality of food, preservatives are added to most snacks. In fact, there is no need to talk about the discoloration of anti-corruption agents. It is "hooliganism" to talk about toxicity without dosage. It is actually harmless to add a proper amount of preservatives.