Why Do Elite Athletes Have Bad Teeth? (The Research, Explained)

Here is the paradox: 94% of elite athletes brush their teeth twice daily — a higher rate than the general adult population — yet studies consistently find they have worse dental health. A landmark 2019 study by Gallagher et al. (UCL Eastman / British Dental Journal) of 352 elite UK athletes found 49.1% had untreated tooth decay, 77% had gingivitis, and 32% reported that their oral health had directly hurt their training or performance. Brushing is not enough. Five mechanisms explain why.

What Does the Research Actually Show About Athlete Dental Health?

The UCL Eastman study (Gallagher et al., British Dental Journal, 2019) remains the most-cited dataset in this field:

• 352 elite UK athletes across 11 sport disciplines, all competing at national or international level
• 94.4% brushed twice daily (vs. approximately 75% in the general UK adult population at the time)
• 49.1% had untreated dental caries (decay)
• 77.0% had gingivitis (gum inflammation)
• 44.6% had dental erosion
• 14.7% had periodontitis (established gum disease)
• 32.0% reported oral health had hurt training or competitive performance

These numbers are consistent with Olympic-cohort screenings at London 2012 and Rio 2016 (55% and 38% caries prevalence respectively) and with pooled systematic review data (NCBI PMC12731738, 2024) showing gingivitis prevalence of 58–77%. The dental health disadvantage in athletes is a real, reproducible, sport-physiology-related phenomenon.

See all athlete oral health statistics →

Why Do Athletes Have Worse Teeth Despite Good Hygiene? The 5 Mechanisms

Mechanism 1: Sports Nutrition Acids

Every gel, chew, sports drink, and electrolyte tab an athlete consumes during training is, with very few exceptions, acidic enough to erode enamel. The critical threshold is pH 5.5. Most sports nutrition products fall between pH 2.9 and 4.5. But the critical variable is not how acidic a product is — it is how long the acid stays in contact with enamel.

An endurance cyclist sipping an electrolyte drink continuously across a 4-hour ride has near-continuous acid contact for the entire session, with saliva's buffering protection already compromised by exercise-induced dry mouth. The Medicina 2024 paper (doi:10.3390/medicina60020319) confirmed this: sipping frequency and session duration predicted enamel erosion better than either the total acid dose or total sugar consumed.

Mechanism 2: Exercise-Induced Dry Mouth

Saliva is the mouth's primary acid-neutralizing system — it buffers acids, delivers calcium and phosphate to re-mineralize softened enamel, and mechanically clears food debris. During moderate-to-intense exercise, saliva flow drops by 40–60% due to sympathetic nervous system activation and dehydration. Mouth breathing during high-intensity effort dries the oral cavity further.

The net effect: an athlete consuming acidic sports nutrition during a long training session is doing so in an environment where the natural defensive system against that acid is significantly impaired.

Mechanism 3: Stress Bruxism

Bruxism — unconscious jaw clenching and teeth grinding — is strongly linked to psychological stress. The American Academy of Sleep Medicine data indicates that approximately 70% of bruxism cases are stress-triggered. Elite athletes operate under chronic high stress: intense training loads, performance pressure, competition anxiety, and career uncertainty.

Athletes also clench during training itself — any high-effort physical task triggers a bracing reflex that includes the jaw musculature. The damage from bruxism is mechanical: it flattens cusps, causes microcracks at the margins of old fillings, and compounds the chemical erosion from acids. A tooth that is already acid-softened and then mechanically loaded sustains more damage than either insult alone.

Mechanism 4: Irregular Dental Care Scheduling

Elite athletes have unusual lives. Training camps move them across time zones. Competition seasons run most of the year. Survey data embedded in the BDJ 2025 review (nature.com/articles/s41415-025-8909-7) found that a substantial minority of elite athletes attend a dentist fewer than once per year. The 49.1% untreated decay figure from the UCL Eastman study is largely a figure about people who have not seen a dentist recently enough for treatment to be provided.

Mechanism 5: Recovery Nutrition Timing

Post-exercise nutrition timing is a cornerstone of modern sports science: consume protein and carbohydrate within 30–45 minutes of training for optimal recovery. Athletes follow this advice diligently.

The dental problem: enamel is at its most vulnerable in the 30–45 minutes immediately after acid exposure, before saliva has re-hardened the softened surface. An athlete who finishes a training session full of sports drink acidity and immediately consumes a high-sugar recovery meal has: already softened their enamel with the session's acid load; not waited for saliva to remineralize it; and loaded it with fresh sugar that feeds acid-producing bacteria.

Which Sports Have the Worst Dental Health?

• Endurance sports (cycling, triathlon, marathon): Highest erosion rates — prolonged acid fueling combined with dry mouth
• Weight-class sports (combat sports, gymnastics): Elevated erosion from acidic products during weight management
• Team sports (football, rugby, hockey): High caries and trauma rates; sugar-gel use combined with contact trauma
• Racket sports (tennis, squash, table tennis): Bruxism from jaw clenching under pressure; acid from sports drinks
• Swimming: Pool chlorine (pH 7.2–8.0) is slightly protective for erosion, but competitive swimmers show high caries from sugar-gel use on dry land

The consistent finding across all sport types is high gingivitis prevalence — suggesting the inflammatory component of heavy physical training plays a role independent of sport-specific exposures.

Does Poor Oral Health Actually Hurt Performance?

Yes — athletes say so directly, and there are plausible physiological mechanisms. In the BDJ 2019 study, 32% of 352 elite athletes said oral health had negatively affected their training or performance. The Rio 2016 Olympic screening found 29% reported a performance impact.

The direct mechanisms are obvious: dental pain disrupts sleep, affects nutrition intake, and causes distraction during training or competition. The less obvious mechanism is the systemic inflammation pathway. Chronic periodontal disease produces a sustained systemic inflammatory response — elevated C-reactive protein and pro-inflammatory cytokines. Athletes already operate under high inflammatory load from training. Adding chronic periodontal inflammation on top can impair recovery and affect immune function.

What Are Elite Sports Organizations Doing About It?

The FDI World Dental Federation has a Sports Dentistry commission and has partnered with multiple Olympic organizing committees to run athlete screenings at the Games since 2012. Several national Olympic committees now include dental screening in routine athlete health assessments, though the BDJ 2025 review notes this remains a minority practice. Some professional team sports clubs — particularly in European football and rugby — have added sports dentists to their multidisciplinary support staff. The International Olympic Committee consensus statement on athlete health includes oral health as a recommended component of periodic health evaluations, though implementation varies widely.

What is largely missing is the integration of oral health into sports nutrition education. The people who design fueling protocols — sports dietitians, coaches, performance nutritionists — are generally not trained in dental physiology, and sports dentists are rarely in the room when fueling strategies are designed. That gap is where most of the preventable damage occurs.

Is the Picture Getting Better or Worse?

The 2025 BDJ review's conclusion — that the oral health gap between athletes and the general population has not narrowed since London 2012 — is a sobering finding after more than a decade of Olympic screening programs, academic publications, and growing sports media coverage of athlete oral health. The awareness has not translated into practice change at scale.

Two structural factors explain most of this. First, the people who would change the situation — sports dietitians, team doctors, performance coaches — are not currently trained in dental physiology and do not have the tools or mandate to address oral health in their athlete consultations. Sports dentistry is a recognized specialty in only a handful of countries, and sports dentists are rarely embedded in athletic performance support structures outside of the highest levels of professional sport. Second, the athletes experiencing the problem tend to manage it as a private discomfort — dental pain managed with over-the-counter analgesics between competitions, erosion noticed as sensitivity but not investigated, gingivitis visible but not acted on — rather than reporting it as a performance issue to their support team. The stigma of "neglecting your teeth" attaches even when the neglect is systemic and structure-driven rather than personal.

The pathway to change that sports dentistry researchers consistently recommend is integration: oral health screening embedded in the standard athlete health check, sports nutrition education that includes dental physiology, and sports dentists as regular members of elite performance support teams rather than external referrals. Until that structural change happens, the individual athlete who understands the five mechanisms and acts on them is ahead of the curve.

What Can Individual Athletes Do Right Now?

Most of the actionable steps require no additional cost and no change to training. Brushing twice daily is already near-universal in elite athlete populations — and the research shows it is not sufficient on its own. The steps that complement brushing are: using a fluoride toothpaste and not rinsing it off immediately (allow the fluoride to stay in contact with enamel); rinsing with plain water after any sports drink or gel rather than leaving acid on the tooth surface; waiting 30 minutes after an acidic exposure before brushing, to allow saliva to begin re-hardening the enamel surface before a toothbrush is applied to it; and telling a dentist that you are a competitive athlete with a regular fueling protocol, so they can assess erosion risk and track it over time.

None of these steps have any cost in time or performance. They do not require switching products or changing fueling strategy. They require knowing that the risk exists — which is what the research, sitting behind journal paywalls and rarely translated for athletes, has been saying consistently since 2012.

Related reading: The Complete Oral Health Picture · Table Tennis vs. Other Racket Sports · Women’s Hormones and Oral Health · Masters Players and Dry Mouth · Youth Players and Dental Development · Para Table Tennis Oral Health · Supplements and Dental Health

The Athlete's Mouth — an Edges & Nets guide. Last updated June 2026.

Frequently asked questions

Is it true that athletes have worse teeth than the general population?

Yes, based on multiple independent studies. The UCL Eastman BDJ 2019 study, the London 2012 and Rio 2016 Olympic screenings, and a 2024 systematic review (NCBI PMC12731738) all find higher rates of dental caries, erosion, and gingivitis in competitive athletes than in comparable general population samples — despite athletes reporting better brushing habits.

What is the main cause of tooth decay in athletes?

The research points primarily to sports nutrition practices — specifically the frequency and duration of acid exposure from gels, drinks, and chews — combined with exercise-induced dry mouth reducing saliva's natural acid-buffering function. This is a more significant driver than brushing frequency, which is already high in most elite athlete populations.

Do all types of athletes have the same dental problems?

No. Endurance athletes (cyclists, triathletes, marathon runners) show higher erosion rates due to prolonged fueling. Contact sport athletes show higher trauma rates. Weight-class athletes show elevated erosion from acidic products used during weight management. Gingivitis, however, is consistently elevated across all sport types and levels.

Can mouth inflammation from gum disease actually affect training?

Possibly, yes. Chronic periodontal disease produces systemic inflammation — elevated C-reactive protein and pro-inflammatory cytokines. For athletes already carrying high training-induced inflammatory load, chronic periodontal inflammation could theoretically impair recovery and immune function. This connection is increasingly studied in sports medicine but remains an area where more research is needed.

What should athletes do differently at the dentist?

Tell your dentist you are a competitive athlete and describe your fueling practices: how often you use sports drinks or gels, for how long, and which products. Most dentists are not trained in sports nutrition and will not ask. With that information, they can assess erosion risk specifically, recommend appropriate fluoride products, and schedule monitoring at appropriate intervals.