Love Your Mouth | Self-Control

Self-control—also called temperance—means learning to govern our choices rather than allowing appetite, cravings, convenience, or habits to govern us. In oral health, this principle is especially important because many harmful behaviors are not dramatic events. They are small choices repeated day after day: another sip of soda, another snack between meals, a cigarette, a pouch tucked between the lip and gum, or a decision to skip brushing because we are tired. Over time, repeated choices become habits, and habits can become dependencies. Self-control gives us the ability to stop that process before a habit takes control.

What Goes Into the Mouth—and How Often

Oral health is affected not only by what we eat and drink but also by how frequently we expose the teeth to sugar and acid. Dental caries is a biofilm-mediated, sugar-driven disease. When bacteria in dental plaque metabolize fermentable carbohydrates, acids are produced and the pH of the plaque falls. At a sufficiently low pH, minerals begin to leave the tooth surface. Saliva then works to neutralize acids and return minerals to the teeth. Frequent eating and drinking gives the mouth less time to recover between these episodes.¹

This is why sipping soda, sweet tea, energy drinks, sweetened coffee, or other sugary or acidic beverages throughout the day is so harmful. Each exposure can lower the pH of the mouth, and repeated exposure keeps the teeth cycling between demineralization and remineralization. Acidic beverages can also cause dental erosion, which is a different process: acid directly dissolves tooth mineral without the involvement of bacteria. Frequent consumption of soft drinks and other acidic beverages is an important risk factor for erosive tooth wear.¹,²

The same principle applies to frequent snacking. A person may not eat large quantities at any one time, yet repeated exposure to sugar throughout the day can increase the number of acid challenges experienced by the teeth. Hard candy, sweetened mints, sticky dried fruit, cookies, crackers, and other foods eaten repeatedly between meals can keep the oral environment under repeated attack. Self-control means establishing regular meal and snack patterns rather than allowing the mouth to become a nearly continuous delivery system for sugar and acid.¹

Screen Time, Grazing, and the Desk

Long periods at a computer or gaming device can quietly encourage another form of intemperance: grazing. A person may sit at a desk for hours with a soda, energy drink, sweetened coffee, candy, chips, crackers, or other snack within reach. The problem is not simply the total amount consumed. It is the repeated exposure that occurs when a person takes another bite or sip every few minutes.

This pattern is particularly concerning because the person may not think of it as eating or drinking a meal at all. It becomes part of the activity. The same thing can happen in workplaces where food is constantly available. Regular meal times help break this cycle. Water is an excellent choice between meals, and keeping a toothbrush at the workplace can make oral hygiene easier to maintain. Even when toothpaste is not available, brushing with a toothbrush can physically disrupt and remove dental biofilm.

The goal is not to make food frightening or to eliminate every enjoyable snack. The goal is to regain control over frequency and habit. A person should be able to decide when to eat and drink rather than automatically reaching for something because it is sitting beside the computer.

Late-Night Snacking: A Special Concern for Older Adults

Late-night eating deserves particular attention in older adults. Many older people take several medications, and medications are a major cause of dry mouth. Reduced salivary flow removes less food from the teeth, provides less buffering against acids, and reduces the natural protection saliva provides against tooth decay. Dry mouth is associated with increased risk of cavities, oral infections, and tooth loss.³,⁴

A pattern frequently seen in older adults is eating ice cream or another sweet food after brushing the teeth for the night and then going to bed without cleaning the teeth again. This can be particularly damaging when salivary flow is already reduced. The combination of a sticky or sugary food, diminished saliva, and many hours without another cleaning allows the oral biofilm to remain in contact with fermentable carbohydrates throughout the night. Decay along the gumline can be especially destructive in an older person whose roots may be exposed because of gum recession.

The practical lesson is simple: if you eat after brushing your teeth for the night, clean your teeth again before going to bed. For an older adult with dry mouth, this habit can make an important difference in protecting the remaining teeth.

Caffeine: The Socially Accepted Psychoactive Drug

Because caffeine is found in coffee, tea, and many beverages sold in grocery stores, it is often viewed as simply another food ingredient. In reality, caffeine is the world's most widely used psychoactive stimulant. It changes brain function, increases alertness, can produce tolerance and physical dependence, and can cause withdrawal symptoms such as headache, fatigue, irritability, and difficulty concentrating when regular use is suddenly reduced or stopped.⁵,⁶

Caffeine does not create energy in the way food does. It temporarily changes nervous-system activity so that fatigue becomes less noticeable. As the effect wears off, some people experience a decline in alertness and use caffeine again to restore the feeling. This can create a cycle in which tiredness is repeatedly treated with stimulation rather than with the rest and recovery the body actually needs. The older health literature contained in this curriculum likewise emphasizes the distinction between temporary stimulation and genuine nourishment. Dr. Tim Arnott's 24 Realistic Ways to Improve Your Health specifically discusses caffeine, coffee, and refined sugar and recommends leaving caffeine out.

If caffeine were introduced today as a newly synthesized psychoactive compound rather than as a substance with a long history of accepted use in coffee and tea, its pharmacologic effects would receive substantially more attention. Its stimulant properties, dependence potential, withdrawal effects, and effects on the nervous and cardiovascular systems would require evaluation as they would for any biologically active psychoactive substance. Its relatively permissive treatment today reflects its long history as an accepted part of human consumption—not an absence of biological activity.

For the principle of temperance, the important question is not whether society considers caffeine normal. The question is whether the substance has begun to control the person using it.

Coffee

Coffee deserves consideration beyond its caffeine content. Coffee contains numerous biologically active compounds, and it can stimulate gastrointestinal activity. Coffee consumption has been studied in relation to reflux, although the evidence does not show that coffee universally causes gastroesophageal reflux disease; individual responses vary.⁷

Coffee and other caffeinated beverages may also contribute to dry mouth in some people, and reduced salivary protection can increase oral-health risks.

Coffee's gastrointestinal effects can connect directly to oral health:

Increased reflux in susceptible individuals → increased exposure of the teeth to stomach acid and greater risk of enamel erosion.
Dry mouth → less saliva to protect the teeth and neutralize acids.
Frequent sipping → repeated acid exposure and less opportunity for recovery.
Added sugar and syrups → increased risk of dental caries.
Dark pigments → tooth staining.

The concern therefore is not simply the cup of coffee itself. It is the entire pattern surrounding its use: caffeine dependence, repeated sipping, added sugar, possible dry mouth, and, in susceptible people, reflux and resulting acid exposure.¹,²,⁷

Tea: Caffeine, Tannins, and Tooth Staining

Tea contains caffeine, but it also contains tannins and other polyphenolic compounds. Tannins can bind to non-heme iron—the form of iron found in plant foods—and reduce its absorption when tea is consumed with an iron-containing meal. A controlled study found that drinking tea with an iron-containing meal reduced non-heme iron absorption, while waiting one hour after the meal significantly reduced the inhibitory effect.⁸

This matters when teaching whole-food, plant-based nutrition, particularly in communities where iron deficiency is already a concern. Plant foods can provide iron, but the body must absorb that iron. Regularly drinking tea with meals can work against that goal. Separating tea from meals is a simple way to reduce this interference.⁸

Tea also creates a significant cosmetic problem: staining. Tea contains chromogenic compounds that interact with the tooth surface and acquired pellicle, producing extrinsic discoloration. Studies demonstrate that tea and coffee can produce significant tooth staining, with tea often showing particularly strong staining potential.⁹,¹⁰

For those who work closely with oral health, this is not merely theoretical. Long-standing tea stain can become extremely tenacious and may require instrumentation before the surface can be polished effectively. The discoloration is not the same as dental decay, but it is a visible reminder that what we repeatedly place in the mouth can remain on the teeth.

Energy Drinks and Sweetened Beverages

Energy drinks deserve special attention because they frequently combine caffeine with sugar and acidic ingredients. This creates a double challenge: the caffeine encourages stimulation and repeated use, while sugar and acid challenge the teeth.¹,²

The same concern applies to sweetened tea, specialty coffee drinks, soft drinks, sports drinks, and similar beverages. The issue is not merely how much sugar is consumed at one time. Frequency matters. Repeated sipping can repeatedly lower oral pH and expose the teeth to acid.

Although these beverages differ in their ingredients, many share an important characteristic: they expose the teeth to repeated acid challenges. Specialty coffee drinks, sweetened teas, soft drinks, and energy drinks may contain substantial amounts of added sugar, be highly acidic, or both. Each exposure can lower the pH of the mouth, allowing bacteria within the dental biofilm to metabolize sugars and produce additional acids that dissolve minerals from the tooth surface. When these beverages are sipped repeatedly throughout the day, the mouth remains in an acidic environment for prolonged periods, giving saliva less opportunity to neutralize acids and begin the natural process of remineralization. Over time, this repeated cycle increases the risk of dental caries and enamel erosion.¹,²

Tobacco, Snuff, and Smokeless Tobacco

Smoking is one of the clearest examples of a habit that belongs under self-control. Tobacco use is strongly associated with periodontal disease, impaired healing, tooth loss, and oral cancer.¹¹,¹² The effects are not limited to the lungs. The mouth is one of the first tissues directly exposed to tobacco.

Smokeless tobacco is not a harmless alternative to smoking. Snuff and related smokeless tobacco products contain nicotine and numerous harmful chemicals, including tobacco-specific carcinogens. The National Cancer Institute states that smokeless tobacco causes cancers of the oral cavity, esophagus, and pancreas and is also associated with gum disease and oral lesions such as leukoplakia. Nicotine is absorbed directly through the tissues of the mouth and is addictive.¹²

This is particularly important because smokeless tobacco products can appear clean and convenient. There is no smoke, no ash, and little visible evidence of use. Yet the absence of smoke does not mean the absence of harm. Harvard Health similarly emphasizes that snuff may reduce some risks associated with smoking, particularly those related to inhaling burned tobacco, but it still carries serious risks, including oral cancer, gum disease, tooth damage, bone loss, tooth loosening, and tooth loss.¹³

Pouch products deserve attention as they become increasingly visible again. Traditional tobacco pouches contain tobacco; newer nicotine pouches may contain nicotine without tobacco leaf. These products should not be treated as identical, but neither should nicotine pouches be assumed to be harmless. A 2024 systematic review found that oral mucosal changes at the site where nicotine pouches were placed were common among the small number of studies available. Reported effects included white or wrinkled lesions, dry mouth, soreness, gingival blisters, and unusual sensations. The researchers emphasized that the evidence base is still limited and that more long-term research is needed.¹⁴

The important distinction is this: smokeless tobacco is a carcinogenic tobacco product; nicotine pouches are a different product category, but they still deliver an addictive drug directly to the mouth. Self-control means understanding that difference without allowing either product to become a habit that controls us.

Nicotine: When Blood Flow Matters

Nicotine is more than an addictive substance. It is also a vasoactive chemical that can constrict blood vessels and affect the microcirculation. When tissue is injured and trying to heal, it needs an adequate supply of oxygen, nutrients, immune cells, and other materials delivered through the bloodstream. Nicotine-induced vasoconstriction can reduce nutritional blood flow. Nicotine can also increase platelet adhesiveness, which may contribute to microvascular obstruction.¹⁵

Smoking creates additional problems beyond nicotine itself. Carbon monoxide reduces the blood's oxygen-carrying capacity, while other components of cigarette smoke interfere with inflammatory and reparative processes. Research on wound healing has shown that smoking reduces tissue oxygenation and impairs several stages of repair, including inflammatory-cell function, fibroblast activity, collagen production, and tissue remodeling.¹⁶

This is why surgeons routinely instruct patients not to smoke around surgery. Healing tissue requires blood flow and oxygen. A systematic review and meta-analysis involving nearly half a million surgical patients found that smokers had substantially higher odds of tissue necrosis, delayed healing, wound separation, surgical-site infection, wound complications, and failure of bone healing than nonsmokers.¹⁷

The importance of blood flow can be seen dramatically in microsurgery. In digital replantation—the surgical reattachment of a severed finger—surgeons reconnect extremely small blood vessels to restore circulation. Research has demonstrated that cigarette smoking can acutely reduce blood flow in replanted digits. In one study, blood flow fell by an average of 8% during the first cigarette and 19% during the second, with little recovery during the following ten minutes. The researchers concluded that smoking after replantation should be prohibited to protect circulation.¹⁸ Another report described two cases in which smoking soon after digital replantation produced vasospasm and compromised the tiny vascular connections.¹⁹

The same biological principle applies around teeth. Periodontal treatment creates a healing environment in tissues that have already been damaged by periodontal disease. Smoking is associated with poorer responses to periodontal treatment, including less improvement in probing depth and clinical attachment.²⁰ A systematic review and meta-analysis also found that smokers experienced significantly less bone regeneration following periodontal treatment.²¹ Another systematic review found that smoking cessation was associated with improved periodontal outcomes, including reduced progression of attachment loss and less radiographic bone loss compared with continued smoking.²²

This explains why a smoker may receive the same periodontal treatment as a nonsmoker yet heal less successfully. The difference is not necessarily the treatment itself; the body's ability to repair what has been treated has been altered. Smoking affects tissue oxygenation, immune response, fibroblast function, collagen metabolism, and bone regeneration, while nicotine contributes additional effects on blood vessels and cells involved in repair.¹⁵,¹⁶,²⁰,²¹

The lesson is simple: healing requires blood flow. When tissue is injured, the body immediately begins sending the materials needed to repair it. Constricting the vessels that deliver those materials works against the body's own healing process. This is why nicotine and tobacco belong squarely within a discussion of self-control.

Vaping

Vaping should not simply be treated as identical to cigarette smoking, because the products and exposures are different. At the same time, vaping should not be presented as harmless. Research on its long-term oral effects is still developing, but systematic reviews have reported associations with changes in the oral environment, plaque, inflammatory markers, and periodontal tissues.²³,²⁴

The evidence is not completely uniform. Some recent analyses have found that e-cigarette users have better periodontal outcomes than conventional cigarette smokers, while still identifying concerning biological changes and emphasizing the need for longer-term research.²³,²⁵ That distinction matters. Less harmful than smoking does not mean harmless.

For a discussion of temperance, the central issue is again nicotine dependence. A person who has never used nicotine does not gain a health advantage by beginning to vape. The wisest choice is not to replace one nicotine habit with another.

Alcohol

Alcohol also belongs within a discussion of temperance. Alcohol is a psychoactive drug that can impair judgment and reduce self-control, and its effects extend into oral health. Alcohol consumption is an established cause of several cancers, including cancers of the oral cavity and pharynx.²⁶,²⁷ Alcohol use is also associated with periodontal disease and other oral problems, particularly when consumption is heavy or combined with tobacco.²⁸

The combination of alcohol and tobacco is particularly concerning because their effects on oral cancer risk can reinforce one another. Tobacco and alcohol are among the leading causes of oral cancer worldwide.²⁷ For this reason, abstaining from alcohol and tobacco is not simply a matter of personal preference within a temperance framework; it is a meaningful way to reduce exposure to established oral-health risks.

Breaking Damaging Habits

Self-control applies to more than substances. Some of the most common oral injuries come from unconscious habits that seem harmless at the moment. Chewing ice, biting fingernails, chewing pens or other objects, and using the teeth as tools to open packages or cut things can place abnormal forces on teeth and restorations. A moment of convenience can result in a chipped or fractured tooth.

The same principle applies to delaying oral care. "I'll brush later" may seem insignificant, but repeated postponement can turn into a routine. Television, gaming, work, fatigue, and other activities can push oral hygiene farther down the list until it is skipped altogether. Self-control means deciding in advance that certain behaviors are not negotiable: teeth are cleaned regularly, nighttime oral hygiene is completed, and food eaten afterward is followed by another cleaning before sleep.

These choices may seem small, but self-control is built from small choices. The person who refuses to use the teeth as tools, stops chewing ice, puts down the soda, turns off the gaming system, gets up from the desk, brushes before bed, or refuses the cigarette is exercising the same basic faculty: the ability to choose deliberately rather than automatically.

The Principle of Temperance

The goal of self-control is not simply to avoid one particular substance or behavior. It is to develop the ability to recognize when a choice becomes a habit and when a habit becomes a form of dependence. The question is not merely, "Can I have this?" but "Who is making this decision—me, or my appetite?" When we control the frequency of sugar and acid exposure, refuse addictive substances, protect our teeth from damaging habits, and give the mouth time to recover between meals and drinks, we practice temperance in a very practical way. Self-control gives us the freedom to choose what supports health rather than becoming controlled by what repeatedly calls for our attention.

The nineteenth-century health reformer and Christian author Ellen G. White took this principle further in her writings on temperance. She identified tea and coffee as artificial stimulants and taught that they should be discarded rather than treated as harmless indulgences. She described their temporary stimulation and subsequent decline and connected the repeated use of stimulants with loss of self-control.²⁹,³⁰ Her counsel was not simply about avoiding one beverage; it was about restoring the proper relationship between appetite and reason.

Within the ANSWERS TO Health & Longevity® framework, self-control therefore means freedom. We are not designed to be mastered by tobacco, nicotine, caffeine, alcohol, sugar, constant snacking, continuous sipping, or destructive habits. We are designed to make deliberate choices. Temperance protects not only the teeth and gums, but the freedom to choose what is consistent with health, purpose, and God's design.

References

American Dental Association. Nutrition and Oral Health. The ADA describes dental caries as a biofilm-mediated, sugar-driven disease involving repeated demineralization and remineralization and notes the importance of sugar frequency and snacking. (ADA)
American Dental Association. Dental Erosion. Frequent consumption of acidic beverages, particularly soft drinks, is an important risk factor for erosive tooth wear; intrinsic acid such as reflux can also contribute. (ADA)
National Institute of Dental and Craniofacial Research. Saliva and Salivary Gland Disorders. Insufficient saliva increases the risk of cavities, tooth loss, and oral infection; multiple medications used by older adults can contribute to dry mouth. (NIDCR)
National Institute of Dental and Craniofacial Research. Dry Mouth. Saliva helps wash food from teeth, supplies minerals that help maintain tooth strength, and protects against decay; persistent dry mouth increases the risk of tooth decay and oral infection. (NIDCR)
Meredith SE, Juliano LM, Hughes JR, Griffiths RR. Caffeine use disorder: a comprehensive review and research agenda. Journal of Caffeine Research. 2013;3(3):114–130. (PubMed)
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National Cancer Institute. Smokeless Tobacco and Cancer. Smokeless tobacco causes oral, esophageal, and pancreatic cancer and is associated with gum disease and oral lesions; nicotine is addictive and is absorbed through oral tissues. (Cancer.gov)
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van Adrichem LNA, Hovius SER, van Strik R, van der Meulen JC. The acute effect of cigarette smoking on the microcirculation of a replanted digit. Journal of Hand Surgery. 1992;17(2):230–234. (PubMed)
Harris GD, Finseth F, Buncke HJ. The hazard of cigarette smoking following digital replantation. Journal of Microsurgery. 1980;1(5):403–404. (PubMed)
Heasman L, Stacey F, Preshaw PM, et al. The effect of smoking on periodontal treatment response: a review of clinical evidence. Journal of Clinical Periodontology. 2006;33(4):241–253. (PubMed)
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Shabil M, et al. The impact of electronic cigarette use on periodontitis and periodontal outcomes: a systematic review and meta-analysis. BMC Oral Health. 2024. The authors concluded that available research remains limited and that long-term effects require further study. (PubMed)
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White EG. Counsels on Diet and Foods, Part 2—“Tea and Coffee.” White describes tea and coffee as artificial stimulants and explicitly connects temperance with leaving stimulants alone. (EGW Writings)
Arnott T. 24 Realistic Ways to Improve Your Health. The supplied material includes dedicated chapters on avoiding caffeine and refined sugar, abstaining from alcohol, quitting smoking, and developing lasting lifestyle changes, with supporting references throughout.