The longer the balsamic vinegar is brewed, the higher the grade is, and it can be called balsamic vinegar aged vinegar only when it is brewed in wooden barrels for more than 3 years.
The price starts from several dozens of dollars, besides, the amino acid of balsamic vinegar is 10 times more than that of white vinegar, which seems to have certain effect on weight loss.
I hope it can help you, if you are satisfied, please adopt. A friend's company specializes in importing high-quality food for more than 20 years.
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