Grapes contain two principal acids, malic and tartaric, plus minor quantities of other acids.

Are grapes bad for acid reflux?

While many apples and grapes are regarded as OK for someone with acid reflux to eat, it is wise to avoid particularly sour varieties of these fruits as well.

Are grapes high on acid?

According to classification, grapes are low to medium alkaline fruit. Its PH level ranges between 3.5 to 4.5. Now, as we know, as the value increases on the pH scale, the acidity level decreases, and the commodity becomes more and more alkaline.