The traditional method of making raisins is to spread raisins on the threshing floor or hang them in a cool room to dry. Because of direct sunlight and long drying time, the color of raisins is generally dark. However, it only takes 15-20 days after soaking in drying accelerator, which greatly shortens the drying time, prevents grapes from growing mildew due to long-term humidity, and makes raisins more hygienic.

The main components of drying accelerator include alkali, fatty acid and its ester and emulsifier. Common alkalis in drying accelerators are potassium hydroxide, sodium hydroxide and sodium carbonate. They can destroy the waxy layer on the grape skin, just like replacing a glass window with a screen window, making the water inside the grape more volatile. This is the secret of "quick drying" of grapes.

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Raisins are rich in iron. Many women often have symptoms of pale face and cold hands and feet, which is a manifestation of mild anemia, and a handful of raisins can be improved every day. It was found that the iron content of raisins was 15 times that of fresh grapes. In addition, raisins also contain a variety of minerals, vitamins and amino acids, which is a good product for people with physical weakness and anemia.

Raisins can promote digestion. Raisins contain tartaric acid, which can help digestion. The dietary fiber in raisins can also adsorb toxins from the intestinal wall and promote detoxification.

Raisins also help protect the cardiovascular system. Studies have shown that raisins can lower cholesterol, prevent thrombosis and prevent cardiovascular diseases. It also contains flavonoids, which has antioxidant effect, can scavenge free radicals in the body and resist aging.

People's Daily Online-Eating raisins has many advantages, and different eating methods are recommended.

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