Then I measured out 1/4 cup white vinegar (at a standard 5% acidity) and began making small adjustments, while tasting, to see how close I could get to the acidity and sweetness of rice vinegar.

All vinegar used for cooking in the U.S. contains about 5% acetic acid, which is its defining ingredient, Johnston says. Is vinegar good for health? There are many health claims about vinegar.

All vinegar used for cooking in the U.S. contains about 5% acetic acid, which is its defining ingredient, Johnston says. Is vinegar good for health? There are many health claims about vinegar.