The composition of red wine is quite simple, it is a fruit wine brewed by natural fermentation, and the most content is grape juice, accounting for more than 80%;

Generally, the alcohol produced by natural fermentation of grape red wine containing sugar is 10% to 30%, and there are more than 1000 residues, of which more than 300 are more important.

Although the proportion of these substances is not high, they are the decisive factors of wine quality. Good quality and good taste of red wine is because they can present a balance of organizational structure, which makes people enjoy the taste endlessly.

Extended data:

Red wine is not as old as possible. The year on red wine refers to the grapes of that year. Most (99%) wines have no aging ability, and the best drinking period varies from wine to wine, generally between 2- 10 years.

Only a few particularly good wines have the ability to age. Some top French and Italian wines have the ability to age for decades or even hundreds of years. Many wines from Bordeaux's top wineries are still suitable for drinking even if they have been preserved for more than 1 century.

Tannin (tannic acid) is needed for wine aging, and Cabernet Sauvignon (grape variety) is the most suitable for aging among many grape varieties because of its geographical factors and characteristics.