Grape fruit contains pectin, which decomposes in the brewing process to produce methanol; Amino acids in fruits also produce methanol during metabolism; Temperature will also increase the methanol content in the fermentation process.

As long as the content of decomposed methanol in wine meets the national standard, it will not endanger health. However, it is difficult to detect the content of methanol at home, and it is also easy to cause the flora to exceed the standard because of container, environment and internal decay of fruits. So it is not recommended that you brew it yourself. Once methanol exceeds the standard, headache and chest tightness may occur after drinking; At the same time, some people choose to add sugar to help fermentation, but it will make wine harmful to human body.

Extended data:

Homemade wine may easily cause several diseases:

1, hops may appear, that is, a gray-white film is formed on the surface for a long time, which gradually thickens and forms wrinkles.

2, it is sour, that is, the wine turns sour into vinegar during brewing. To avoid this situation, the trace additive sulfur dioxide should be used correctly in the process of fermentation and registration, and the acetic acid bacteria should be killed to the greatest extent, and the contact between wine and air should be strictly avoided.

3. Anaerobic microbial diseases. To prevent this, it is necessary to prevent the fermentation temperature from being too high during the development process, and the fermentation should be thorough and sufficient.

4, make the wine turbid, to avoid it, it is necessary to avoid contact with iron in the brewing process, pay attention to oxygen isolation.

Although the price of home-brewed wine is affordable, the conditions and techniques of most home-brewed wines are not up to standard at present, and harmful substances such as methanol and fusel oil cannot be removed in the brewing process, so try not to make home-brewed wine, and it is best to choose some brand wines to buy. This is responsible for your own health and for your family.

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