2, easy to breed mold: used to make wine grapes need to be high maturity, no damage, no signs of mold and other grapes. Grapes are not easy to keep at room temperature and are prone to mold, and if the freshness is not high, it will make it easier for mold to grow in the wine. Therefore, the process of homebrewing wine must use fresh grapes, do not buy the grapes home to store a few days before starting to brew wine.
3, the choice of container may lead to toxicity: the whole process down to use a lot of containers, one of the most important is the fermentation container, there is no doubt that if we use glass, ceramic as a fermentation container, is safe and reliable. And if you put stainless steel, or even iron containers to serve as fermentation containers, is likely to brew poison. There are also people who use clay firing kimchi altar to make wine, the result is that because the lead content of the kimchi altar exceeds the standard, the use of such containers to make wine will also lead content exceeds the standard, homebrewing such a wine is very dangerous.
4, too much sugar unified health hazards: In fact, most of the time in the winemaking should try to avoid containing sugar. In countries where the winemaking process is well developed, people have made rounds and rounds of arduous explorations in order to make wines that contain less sugar or even no sugar at all. But in the process of homebrewing wine but choose to add more sugar to help fermentation, the wine itself is beneficial to the human body, even if diabetics can drink, but if which add too much sugar, it will produce some harm to the human body.
5, health problems may lead to toxicity: after all, the fermentation time is usually 7 days. In this process, if it is infected by bacteria, then it is likely to let the grapes rot. Or your fermentation container is not washed, stirring the container is not clean, are likely to lead to bacterial infection, think about it differently, your food is put for a long time, it will also be spoiled.
6, hidden harmful substances: home-brewed wine may be hidden methanol and creosote, there are certain toxic side effects on the body, the current home-brewed wine has not been removed from the process of methanol and creosote, so some people drink home-brewed wine, there will be a headache after the belly stuffy symptoms. Moreover, because the hardware is not up to standard, not able to realize the whole closed sterilization production, home-brewed wine is also very difficult to meet the health standards, there may be E. coli exceeds the standard, which leads to gastrointestinal discomfort.