Vinegar: Why do vinegar on the market contain different additives? Isn't it said that mature vinegar doesn't need to add any additives?

I have answered this question many times. There is brewed vinegar on the market. The main ways to distinguish it are as follows:

If you want to buy vinegar in the supermarket, the possibility of fraud is much smaller. Look at the label ingredient list. If there is sodium difluorobenzene or other chemicals in it, it must be blended. Secondly, if you look at the price, the price of 500 grams of authentic fermented vinegar is generally above 7 yuan. Because the brewing cycle is long and the cost is high, it is basically blended below this price. After buying it, you can smell it. The fermented vinegar tastes mellow and the blended vinegar has a pungent taste. Finally, it looks terrible. Pour half a cup into a cup or bowl and gently shake the cup. After the shaking stopped, the cup wall became thicker and thicker, indicating that the better the vinegar, the blended vinegar basically failed. Finally, pure vinegar has no shelf life, because vinegar has the characteristic of not deteriorating for a long time.