Hawthorn juice, citrus juice, grape juice can be stored for 3-5 days, peach juice, pear juice, preferably within 2 days.
Juice is a well-known nutritional drink, but after many people buy it home, it usually takes a while to finish. As everyone knows, during this period of time, the main nutrient components have fallen a lot, and some have even completely disappeared.
When freshly squeezed out, the juice preserves the main nutrients in the fruit, but the vitamins in it are chemically unstable and gradually decompose and lose their activity; some traces of physiologically active substances are also gradually lost, or they become less active. form. In addition, the juice is stored for a long time, the taste will be more and more light, the color will be more and more shallow, because it is gradually reduced flavor and natural pigments. These factors lead to a decline in their nutritional value.
Like many foods and juices, the longer they are kept, the more nutrients are reduced. Because food is a highly active substance. After an apple is squeezed into juice, many of its enzymes are still alive, and some ingredients continue to undergo chemical reactions that gradually change their quality. Only minerals, dietary fiber, and starch are more resistant to storage and will not change significantly.
Therefore, when purchasing fruit juices, it is necessary to try to select the products that are manufactured soon; it is necessary to drink them in time after buying them, and they must not be stored for a long time, especially after opening.
In the storage, the fastest loss of juice ingredient is vitamin C. Different kinds of juices are stored under different conditions, and the loss rate of vitamin C is also different, ranging from 20% to 100%. In general, the greater the acidity of the fruit juice, the longer the vitamin C can be stored, because vitamin C is the most stable under such conditions, and the microorganisms are not easy to reproduce. Hawthorn juice, citrus juice, grape juice and other open, you can store in the refrigerator 3-5 days, while the lower acidity of peach juice, pear juice, etc., it is best to drink within 2 days after opening.