Sports Drinks and Tooth Erosion in Table Tennis: What Every Player Should Know

Reach into almost any serious table tennis player's kit bag and you will find at least one sports drink — bright, flavoured, and acidic enough to strip paint if you left it there long enough. That last part is barely an exaggeration. Most of the mainstream sports and isotonic drinks have a pH somewhere between 3.0 and 4.5. Lemon juice sits around 2.5. The threshold at which dentists start worrying about enamel dissolution is pH 5.5. Every bottle you crack open during a session is acidic enough to soften the mineral surface of your teeth, and you are doing it repeatedly, every few minutes, across sessions that often run two hours or more.

This piece is not an argument against hydration or against sports drinks altogether — there are good reasons to use them during long, demanding sessions and there is decent evidence they work. It is an argument for knowing what the habit is quietly doing to your enamel over years, and for the small adjustments that get you most of the performance benefit at a fraction of the dental cost.

Why enamel erosion is different from cavities

Most people have heard about sugar causing cavities and understand vaguely that acidic food and drink is also bad for teeth, but the two processes are different enough to be worth separating. Cavities — dental caries — are caused by bacteria that digest sugar and produce acid locally at the tooth surface. Erosion is something else: the direct chemical dissolution of tooth mineral by acid, with no bacteria needed. Acid contacts enamel, softens its crystalline structure, and when the next abrasive action arrives — a brush, a clench, even a tongue running across the surface — it carries a layer of softened mineral away. Do this often enough and the enamel simply thins.

The result looks different from a cavity too. A cavity is a hole, usually dark, usually in a groove or at the margin of a filling. Erosion produces a smooth, shallow, polished-looking surface, often across the entire biting face of the back teeth or a broad concavity on the back of the front teeth. There is no specific pain event to report, no chip, no crack — just a slow geometry change that a dentist notices on a routine check, often years into the process. That invisibility is the whole problem. By the time the patient feels anything — sensitivity to cold drinks, teeth that seem a little shorter — the damage is already real and substantial.

The table tennis exposure pattern

Among athletes, the key variable in sports-drink erosion risk is not what you drink but how you drink it — specifically, how long the acid is in contact with the enamel surface across a session. In most sports, that pattern is one or two drinks between halves, quickly consumed, with long dry periods in between. The mouth acidifies briefly, saliva buffers it, enamel remineralises. No problem. Table tennis produces a fundamentally different exposure pattern, and it is worth being specific about why.

Sessions are long. Multiball training and match practice routinely run two to four hours. Rest breaks are short — thirty seconds between games, a couple of minutes between exercises. The conventional advice in sports nutrition is to sip steadily through a session to maintain hydration, which is sensible for the muscles and cardiovascular system and ruinous for the principle of letting enamel recover between acid hits. Every sip resets the clock. If a single sip of a pH-3.5 sports drink acidifies the mouth for 20–30 minutes, and you sip every ten minutes across a three-hour session, you have essentially been in continuous acid exposure for three hours. The remineralisation window, which requires a neutral or basic oral environment to function, never fully opens.

The problem is compounded by the open-mouth breathing that kicks in once the session gets demanding. Intense exercise drives players into oral breathing, saliva evaporates faster than the salivary glands can replenish it, and the mouth dries out. Saliva is not just water — it is the primary buffer system that neutralises acid in the mouth, and it is the delivery vehicle for the calcium and phosphate that remineralise enamel between challenges. Reduce saliva and you reduce both the buffer and the repair mechanism at exactly the moment when the acid load is highest. A dry mouth and an acidic drink together are a more corrosive combination than either alone.

What the research shows

Sports-drink erosion has attracted enough research in the last two decades to be well-characterised. Studies measuring Vickers hardness of enamel after immersion in common sports drinks consistently show surface softening within minutes of exposure; some find enamel loss measurable in microns after a single one-hour exposure. Epidemiological surveys across multiple sports find that athletes show higher rates of enamel erosion than the general population, with the association strongest in endurance and racket sports where session length is greatest and drink consumption is most sustained. A 2025 systematic review in the journal Nutrients found erosive potential across the most popular sports and energy drinks, noting that isotonic drinks — the standard in table tennis — were consistently in the erosive range despite being marketed as a healthier option than energy drinks.

The picture from athlete populations is also clear on the dose-response relationship: more hours of training per week correlates with more enamel erosion, and the association becomes stronger when controlled for drink type and frequency. Players who train eight hours a week show more erosion than those training four hours, even when drink brand and dilution are held constant. It is a volume problem.

The silent interaction with jaw clenching

There is an interaction worth flagging here, because it does not come up often enough: the sports-drink erosion story and the jaw-clenching story are not independent. Enamel that has been softened by acid is more vulnerable to mechanical wear than fully mineralised enamel. The sequence of events in a long table tennis session — repeatedly sip acidic drink, soften enamel, then clench the jaw through a tense exchange against softened enamel — accelerates the wear that either process would produce alone. The acid primes the surface; the mechanical load then acts on a surface that is already compromised. It is part of why dentists who work with athletes see a more aggressive erosion-wear pattern than either the lab models of acid exposure or the models of mechanical load alone would predict.

The practical implication is that the two habits — acidic drinking and jaw clenching — interact, so addressing either one reduces total damage, but addressing both is considerably more effective than addressing one and leaving the other. The rinsing habits described below do not just protect against acid erosion; they also ensure enamel is fully remineralised before the next bout of mechanical pressure.

Six habits that actually reduce the risk

The goal is not to give up hydration — that would harm performance and health in ways that dwarf any dental benefit. The goal is to reduce the total time enamel spends under acid attack during a session and to support the remineralisation that happens between those windows. Six habits address the bulk of the risk, roughly in order of impact:

1. Use a bottle or straw, not a wide-mouth glass. Drinking from a sports bottle directs liquid to the back of the throat with minimal contact with the anterior teeth, which are the first and most visibly affected by erosion. Swirling a sports drink around the mouth, or drinking it from an open cup, multiplies the enamel contact area unnecessarily.
2. Rinse with plain water after each bottle. A 10-second water rinse immediately after finishing a sports drink physically dilutes and helps neutralise residual acid before the enamel acidification window fully opens. It costs nothing, takes five seconds, and meaningfully shortens the acid contact time for every serving.
3. Wait 30 minutes before brushing. This one runs counter to instinct — surely brushing removes the acid? — but it is one of the most well-established pieces of dental advice in sports dentistry. Acid softens enamel; a toothbrush applied to freshly softened enamel is an abrasive tool working against a compromised surface. The 30-minute wait allows saliva to begin remineralisation and the enamel surface to harden again before the brush arrives.
4. Dilute the drink. Halving the concentration of a sports drink roughly halves the erosion potential, because both the acid and the sugar concentration drop. For training sessions where the carbohydrate demand is not extreme — a two-hour skill session rather than an endurance block — a half-strength drink or a full-strength drink consumed more slowly provides adequate electrolyte replacement with far less acid exposure.
5. Use a fluoride toothpaste consistently, twice daily. Fluoride incorporated into enamel during remineralisation forms fluorapatite, a harder, more acid-resistant mineral than the original hydroxyapatite. This does not make enamel immune to erosion, but it lowers the susceptibility of the surface to each acid challenge. A standard fluoride toothpaste used consistently is the most passive and reliable long-term protection available.
6. Rotate in plain water. One or two bottles of plain water during every session — particularly in the early phase when intensity is lower and carbohydrate need is not yet acute — reduces the total acid load across the session without compromising the carbohydrate delivery that matters later. The body needs water; it needs carbohydrate when the session demands it; it does not need acid at all.

What the erosion looks like when a dentist finds it

It is useful to know what the dentist is looking for, partly to understand why it is so often missed until it is substantial, and partly to know what to ask about at your next appointment. Erosion presents as a smooth, polished or slightly concave surface on the biting faces of the back teeth and the palatal (tongue-facing) surfaces of the upper front teeth. The enamel is not discoloured in the way a cavity is — it may actually look brighter than normal because the surface is glassy and reflective. Teeth may appear slightly shorter over time. There is often new sensitivity to cold drinks or air as the enamel thins toward the softer, warmer-sensitive dentine beneath.

The clinical scoring system dentists now use is the Basic Erosive Wear Examination (BEWE), a 0–3 grade for each sextant of the mouth. Most adults with normal dietary habits score very low. Athletes in high-exposure sports tend to score notably higher on the posterior and palatal sites, often without being aware of any change themselves. If you have been training seriously for more than a few years and have never specifically had your erosion status checked, it is worth asking. The conversation takes a minute; the damage it catches early avoids a great deal more.

The bottom line

Sports drinks are a legitimate and effective tool for long, demanding training sessions. They are also, consumed in the way that most athletes consume them, a significant source of cumulative enamel erosion. The two facts are not incompatible — they simply mean that using sports drinks well, from a dental perspective, requires a little more care than cracking open a bottle and sipping through the session without a second thought.

The reassuring part is that the fixes are genuinely low-effort: bottle over glass, rinse with water, wait before brushing, dilute when you can, use a fluoride toothpaste, and let water carry some of the session hydration load. None of these things meaningfully change your performance or your experience at the table. They do change the surface your teeth arrive at after ten years of training, and that is a trade worth making without much deliberation.

Part of our series on how the demands of competitive table tennis show up in players' long-term health off the table.

Frequently asked questions

Do sports drinks erode tooth enamel?

Yes. Most sports drinks have a pH of 3.0–4.5, which is acidic enough to dissolve enamel — dentists put the danger threshold at pH 5.5. The acid softens the enamel surface for around 20–30 minutes after each sip. Sip repeatedly through a two-hour training session and you chain those windows together into one long acid exposure. Over months and years the enamel thins, the biting surfaces flatten, and the front teeth develop a smooth, glassy erosion on their backs.

Which sports drinks are worst for teeth?

As a rule, the more acidic (lower pH) and the more sugary, the worse. Energy drinks tend to be more erosive than isotonic sports drinks because they are more acidic and often contain citric acid as a preservative. Plain water sits at a neutral pH of 7 and is the only truly safe option. Diluting a sports drink to half-strength roughly doubles the pH and halves the erosion potential, which is a useful middle ground for players who need the carbohydrate and electrolytes.

How can table tennis players protect their teeth from sports drinks?

Six habits make the biggest difference: drink through a sports bottle or straw rather than swishing the liquid around your mouth; rinse with plain water after finishing a bottle; wait at least 30 minutes after acidic drinks before brushing, since brushing softened enamel accelerates the wear; use a fluoride toothpaste daily (fluoride hardens the enamel surface); dilute your drink to half-strength if your sport allows it; and swap at least one training session per week to plain water entirely.

Is dry mouth during table tennis bad for teeth?

Yes, doubly so. Saliva is the mouth's natural acid buffer — it neutralises acid and delivers the calcium and phosphate that remineralise enamel between meals and between sips. When exercise drives you into mouth-breathing and you lose saliva through exertion, the buffering system switches off. Acidic drinks hit enamel that cannot defend itself properly. Staying well hydrated (which paradoxically means not just sports drink — some plain water too) keeps saliva flowing and limits the damage.

Should table tennis players stop using sports drinks?

Not necessarily. Carbohydrate-electrolyte drinks do improve endurance performance and are a legitimate training tool for long, intense sessions. The goal is not elimination but risk reduction: shorter exposure windows, dilution, rinsing, and good fluoride use get most of the benefit with a fraction of the enamel cost.