Drinks That Harm Tooth Enamel — How to Protect Your Teeth

Most people know that fizzy drinks are not good for teeth. Fewer realise that sparkling water, fruit smoothies, wine, kombucha and some sports drinks sit in a similar category — and that sugar is not the main issue in any of them.

Erosion and decay are different processes with different causes, and the distinction determines what you should actually change.

Decay is caused by bacteria fermenting sugars and producing acid locally on the tooth surface. Frequency of sugar exposure is what matters most.

Erosion is caused by acid in the drink itself dissolving the enamel surface directly. No bacteria are involved. Frequency and contact time matter more than quantity.

This is why a sugar-free diet cola is not the safe option people assume — the sugar has gone but the phosphoric and citric acid have not. And it is why sparkling water, which most people regard as innocuous, is mildly erosive because dissolving carbon dioxide forms carbonic acid.

Enamel begins to demineralise below approximately pH 5.5. A great many common drinks sit well below that.

Cola and other carbonated soft drinks. Among the most acidic commonly consumed drinks, because of phosphoric and citric acid combined with carbonation. Sugar-free versions are similarly acidic.

Fruit juices, particularly citrus. Orange, grapefruit, apple and cranberry juices are all markedly acidic. That they are natural does not alter the chemistry.

Smoothies. Acidic, and often held in the mouth longer because they are thick.

Sports and energy drinks. Frequently acidic, and commonly sipped over long periods during exercise — when saliva flow is also reduced by dehydration and mouth breathing. This combination is one of the more damaging patterns we see.

Wine. White wine is generally more acidic than red. Red also stains.

Kombucha and other fermented drinks. Acidic by nature.

Sparkling water. Mildly acidic. Less of a concern than the above, but not neutral, particularly if sipped continuously through the day.

Herbal and fruit teas. Fruit and hibiscus infusions can be surprisingly acidic. Plain black and green tea are not.

Flavoured or vitamin waters. Often contain citric acid.

Broadly safe: plain still water, milk, and plain tea or coffee without added acid. Tea and coffee stain but do not erode significantly — and our article on air polishing versus whitening covers the staining side.

This is the part that makes the practical difference.

An acidic drink taken with a meal and finished within a few minutes produces one acid challenge, buffered by the saliva that meals stimulate. The same drink sipped over two hours at a desk produces a continuous low pH and never allows recovery.

Saliva is the mechanism here. It buffers acid and supplies calcium and phosphate for remineralisation, but it needs time — typically somewhere in the region of half an hour to an hour — to restore the mouth after an acid exposure. Continuous sipping prevents that entirely.

Anyone with reduced saliva, whether from medication, a medical condition or dehydration, is at considerably higher risk.

Limit acidic drinks to mealtimes rather than spreading them through the day. This single change is more effective than most others.

Drink it, do not sip it. Finish within a reasonable period rather than nursing it.

Use a straw positioned towards the back of the mouth, which reduces contact with the front teeth.

Rinse with plain water afterwards to dilute and clear the acid.

Do not brush immediately. Enamel is temporarily softened after an acid exposure, and brushing at that point removes more of it. Wait around an hour. Our article on whether brushing harder cleans better covers the broader point about abrasion.

Finish with something neutral or alkaline — milk, cheese, or plain water.

Chew sugar-free gum afterwards, which stimulates saliva and speeds recovery.

Use fluoride toothpaste and spit rather than rinse. Fluoride helps enamel resist acid and supports remineralisation.

Address dry mouth if you have it, as it substantially raises risk.

Erosion develops gradually and is easily missed until it is advanced.

Signs include teeth appearing more yellow as thinning enamel reveals more dentine, edges of the front teeth becoming translucent or chipped, a smooth glazed appearance to the surfaces, cupping or dished-out hollows on the biting surfaces of molars, fillings that appear to stand proud of the surrounding tooth, and increasing sensitivity to cold and sweet.

Our article on micro-fractures and enamel crazing covers early surface changes, and our article on acidic foods and enamel covers the dietary side beyond drinks.

Where erosion has progressed, treatment may involve white fillings, composite bonding to restore worn edges, or in more extensive cases full mouth reconstruction. Identifying and stopping the cause always comes first — restoring worn teeth without addressing why they wore is not a durable plan.

Regular check-ups allow wear to be monitored, often with photographs or models, so that change over time can be measured rather than guessed at.

If you have noticed your teeth becoming more sensitive, more translucent at the edges, or shorter than they used to be, an assessment can establish whether erosion is occurring and how quickly.

You can arrange an appointment at our Wimpole Street practice.

This article is provided for general information only and does not constitute personalised dental or dietary advice. Tooth wear has several possible causes, including reflux and grinding as well as diet, and requires examination by a registered dental professional to assess. Discuss any dietary changes relevant to a medical condition with your doctor.

Next review due: 7 September 2027