1, easy to breed mold
Winemaking grapes need to be high maturity, no damage, no mold and other phenomena. Grapes are not easy to keep at room temperature, it is easy to mold, if the freshness is not high, it will make the wine more likely to breed mold. Therefore, be sure to choose fresh grapes, do not buy the grapes home to store a few days before starting to make wine.
2, the container is easy to chemical reaction
We usually make wine, the home of the bottles and cans, buckets, vats are almost all in use, glass bottles, Coke bottles, mineral water bottles and so on from time to time "on the battlefield". In fact, when making wine, it is best not to use plastic, stainless steel, aluminum utensils to contain, so as to avoid chemical reactions, resulting in harmful substances to the body. Winemaking is best done with glassware.
3, too much sugar is hazardous to health
In fact, most of the wine brewing try to avoid containing sugar. In countries where wine is developed, people have gone through rounds and rounds of grueling explorations to make wines that contain less sugar or even no sugar at all. Instead, the home brewing process chooses to add more sugar to help fermentation. Wine itself is good for the human body, and even diabetics can drink it, but if too much sugar is added to it, it can be harmful to the human body.
4, fermentation time, temperature can not be controlled
General wine brewing pay attention to the appropriate temperature, otherwise it will affect the fermentation, but also may produce the harmful substances described below.
5, hidden harmful substances
The wine made by oneself may hide methanol and heterohydric alcohol oils, which have certain toxic side effects on the body, and at present, there is no process to remove methanol and heterohydric alcohol oils in the home winemaking, so some people will have headache and stomach congestion symptoms after drinking the home wine. Moreover, because the hardware is not up to standard, not able to realize the whole closed sterilization production, home brewed wine is also difficult to meet the hygiene standards, there may be excessive E. coli, which leads to gastrointestinal discomfort.
6, less phenolic content
As for the nutrients, according to the sommelier identification, homebrew contains less phenolic substances, and the real dry red wine is still a big gap.
It's okay to drink some homebrew occasionally, but it's not for regular consumption. Even if you drink it, you should drink it when it's fresh, as it's likely to harbor a lot of bacteria if it's left for a long time. If you want to drink health care, good for the body, or choose the regular manufacturers of bottled wine better.