The picture above are vinegars. Can you guess which is natural and which is synthetic ?
The left picture is synthetic vinegar and the right picture is natural. Why ? Those vinegars are two months old vinegar. At first day both vinegars are cloudy. But they have different color. The left is white while the right is brownish. As time goes by. The suspended solids in vinegar coagulate and sink . This will give natural vinegars its crystal clear color and bottom sediments. This phenomenon will not happen to synthetic vinegar because manufacturer use chemical cloudifier.
Most synthetic vinegars are cheap while natural vinegar double or triple the price. For health conscious individual, you can do some storage experiment in choosing your vinegar.