soft drinks
Soft drinks get their fresh taste from the added phosphoric acid (for example in cola), citric or malic acid (in all kinds of soft drinks and sports drinks). You won't taste the sour taste because of the added sugar or sweetener. Sugar suppresses the sour taste, but does not neutralize the acid.
Diet soft drinks
Diet soft drinks do not contain sugar, so they do not cause cavities. However, they are usually just as acidic as regular soft drinks and therefore just as dangerous for causing dental erosion.
Fruit juices
Not everyone knows that fruit juices are even more acidic than soft drinks. Fruit juices can therefore also be harmful to your teeth.
Sour fruit
Think of citrus fruits, blackberries and berries, apples, grapes, kiwis and mangos, but also the products thereof (apple syrup, jam).
Acidified foods
Many foods are acidified with acetic acid, such as pickles and onions. All foodstuffs that have been acidified with, for example, acetic or citric acid, also cause dental erosion with frequent use. Consider, for example, salad dressing or mayonnaise.