The hazards of homemade wine are explained as follows:

Due to limitations in the environment, brewing tools, brewing processes, etc., homemade wine will contain harmful substances, and the quality of the grapes will be poor due to pesticides. Hazards include mold breeding during the fermentation process, toxic storage containers, unhealthy proportions of brewing materials, and hygienic issues in self-brewing leading to hidden harmful substances.

We just assume that the grapes are produced from the orchard, so it is very likely that the grapes were sprayed with pesticides during the growth process (in order to increase the yield!), and we do not advocate washing the grapes in the process of making homemade wine. It has to be clean, because it depends on the microorganisms on the surface of the grapes to guide fermentation.

Easy to breed mold

Grapes used to make wine need to be highly mature, without signs of damage, mold, etc. Grapes are not easy to store at room temperature and are prone to mildew. If the freshness is not high, it will be easier for mold to breed in the wine. Therefore, you must use fresh grapes when making your own wine. You must not buy grapes and store them for a few days before starting to make wine.