Rice is the key meal nowadays. Some families will store a lot of rice at the beginning, but under the influence of some factors, they do not swallow this rice immediately, thus causing the rice to be stored for too long and become moldy. However, many people feel that they have lost a lot of moldy rice and want to swallow it. So is it possible to eat rice that is due? It's time for us to handle our doubts.
 The content of nitrite in mature rice is higher than normal. It has certain carcinogenic effect. Pay special attention. Therefore, it is not recommended to take rice that has already expired. The expired rice can be used as livestock concentrate feed to prevent unnecessary adverse effects.
 Nutritional value of rice:
 1. The most critical component of rice is about 70% carbohydrate compounds, plus a certain amount of protein 7%~8%, vitamins, methyl cellulose and minerals.
 2. The nutritional use value of rice is general and relatively balanced, and the B vitamins are very rich and complete. However, during the production of rice, a lot of nutrients may flow out. Generally speaking, the more specially made rice, the more nutrients will flow out. Therefore, the nutrient content of standard 2 rice is higher than that of standard 1 rice, and the nutrient content of black rice is more than that of standard 2 rice.
 3. Among rice proteins, 80% are alkali soluble glutenin with high calcium hydrophosphate content, and the composition of calcium hydrophosphate is higher than that of other cereals. The carbohydrate composition is effectively formulated, which is closer to the best preparation method of protein carbohydrate assessed by the World Health Organization. The biological value level (BV value) of rice protein is 77, and the protein effect ratio (PER value) is 2.2 (1.5 for wheat, 1.1 for corn), The digestibility of protein exceeds 90%, which is higher than other cereals, so the nutritional composition of rice protein is high.
 Some poor shopkeepers like to sell inferior rice as good rice, so it is also crucial to learn how to choose rice by themselves. The strength should be considered when selecting rice. The harder the rice is, the higher the protein content will be, and the rice will be more transparent. In addition, it is also necessary to select rice with smaller belly white, which is of high maturity.