When it comes to vitamin C, everyone first thinks of lemon. Vitamin C is the favorite of all women and has a very good effect on skin beauty. All female friends like to use lemon slices to soak in water. However, in fact, 100 grams of lemon contains only 44 milligrams of VC, which is even lower than that of kiwi and strawberries. So dry lemon slices, really make up for VC?
If you make a lemon, how much vitamin C do you have? It depends on the drying process. Natural air-drying often takes several days. After slicing, the contact area between vitamin C and air in lemon is greatly increased, and most of them are oxidized. Many bags of lemon slices in the supermarket are heated and dried. According to the temperature and slice thickness, the drying time needs 2-12 hours. In order to shorten the processing time, the drying temperature will increase to 100°. C around, and vitamin C is not heat-resistant, will be destroyed in excess of 60 °C, and eventually saved very few.
However, there is a relatively high-grade "freeze-dried lemon slice" on the market, and the price of a box is twenty yuan. This lemon slice is made by using vacuum freeze-drying technology. Through freezing, heating and sublimation processes, the moisture in the lemon is removed. The whole process is at a low temperature and is basically in an oxygen-free state. The color, aroma and taste of the dried lemon slice are as follows: The retention rate of nutrients is high. Some products use small packages filled with carbon dioxide and chlorine, and also contain desiccants to minimize oxidation and resurgence of the turpentine chips. Some of them will also undergo browning treatment after slicing, adding vitamin C and half. Cystine, citric acid and other substances, so that vitamin C in dried lemons may also increase.
In any case, the vitamin C content of fresh lemons is not high, and don't count on how much vitamin C can be supplemented by dry tweezers. To drink lemonade, fresh lemon is preferred. Select the complete lemon of the epidermis, brewing with warm water, cutting it into bubbles, and preventing oxidation of vitamin C. Use unsaturated lemons with plastic wrap to reduce contact with air. It is convenient to buy dried lemon slices. The deep color indicates that browning has occurred. It is definitely not possible to supplement vitamin C. It is recommended to buy freeze-dried, vacuum-packed dried lemon slices.
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