Juice is considered a healthy beverage that aids digestion, soothes the intestines, and supplements deficiencies in dietary nutrients. However, many people buy it home and often take some time to finish it. Unbeknownst to them, during this period, the main nutritional components of the juice have declined significantly, with some even disappearing completely.
Pineapple Pear Juice
When freshly squeezed, juice retains the main nutrients of the fruit, but the vitamins in it are chemically unstable and will gradually decompose and lose their activity; some trace physiologically active substances will also be gradually lost or transformed into less active forms. In addition, the longer juice is stored, the blander its taste and the paler its color will become. This is because its flavor substances and natural pigments gradually decrease. These factors lead to a decline in its nutritional value.
Many foods, like juice, lose more nutrients the longer they are stored. This is because food is a highly active substance. After an apple is juiced, many of its enzymes are still alive, and some components continue to undergo chemical reactions, causing its quality to change gradually. Only components like minerals, dietary fiber, and starch are more resistant to storage and do not change significantly.
Therefore, when buying juice, try to choose products that have just left the factory; after bringing it home, drink it in a timely manner and do not store it for long, especially after opening. Hawthorn juice, citrus juice, and grape juice can be stored for 3-5 days, while peach juice and pear juice are best consumed within 2 days.
During storage, the component that is lost fastest in juice is vitamin C. Different types of juices stored under different conditions have different vitamin C loss rates, ranging from 20% to 100%. Generally, the more acidic the juice, the longer vitamin C can be preserved, because vitamin C is most stable under such conditions, and microorganisms are less likely to multiply. Hawthorn juice, citrus juice, grape juice, etc., can be stored in the refrigerator for 3-5 days after opening, while less acidic juices like peach juice and pear juice are best consumed within 2 days of opening.
Pineapple pear juice