Mr. Cai had a party with his classmates. Some people suggested drinking wine, which is good for cardiovascular and cerebrovascular diseases. But Mr. Cai objected, because once, he opened a bottle of wine to entertain a guest. Unexpectedly, the guest had an allergic reaction after drinking. The doctor said that it was the sulfur dioxide in the wine, which made him stay away from the wine.

so, does wine really contain sulfur dioxide? Why is this substance related to wine? In fact, sulfur dioxide is essential for wine making. It can kill bacteria on the surface of grape skin, and it is also an antioxidant. It can protect the natural fruit characteristics of wine and prevent the wine from aging. Once there is no sulfur dioxide, the wine will go bad in a short time. The World Health Organization stipulates that the maximum amount of sulfur dioxide inhaled per day should be controlled at 0.7 mg / kg. For a 60 kg adult, this is equivalent to 42 mg per day. In Europe and the United States, as long as the content of sulfur dioxide in wine exceeds 10 mg / L, it must be marked “containing sulfur dioxide”. As for the upper limit of sulfur dioxide in wine, the United States is 350 mg / L, China is 250 mg / L, and the average content of sulfur dioxide in wine on the market is about 100 mg / L. After the wine is opened, some sulfur dioxide will be volatilized. If you shake the glass again, 30% – 40% of sulfur dioxide will evaporate. Therefore, every time you shake before drinking, not only the intake of sulfur dioxide is very small, but also make the complex aroma of wine can be fully distributed, good for the body. Some people in

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are “sensitive” to sulfur dioxide, and their symptoms are generally nausea, vomiting, abdominal pain, dizziness, dyspnea, and even life-threatening. This part of the people must pay attention to, once drinking wine when aware of discomfort, must promptly seek medical advice.

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adding sulfur dioxide in wine brewing is actually the most common thing. Although so far, sulfur dioxide can not be replaced in wine, at the end of last year, the European Union found a synthetic substance to replace sulfur dioxide. However, it has not been promoted on a large scale, so it is no longer a dream to replace sulfur dioxide. ▲

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