Remedy Routes
    symptom
    Sleep

    Teeth Grinding

    Teeth grinding (bruxism) is clenching or grinding during sleep or wakefulness, often linked to stress, sleep disorders, and bite issues. A dentist-fitted mouthguard is the primary protection; supplements play only a supporting role.

    TL;DR

    Clenching or grinding the teeth, usually during sleep, driven by stress, sleep arousal and sometimes medications. A dentist-fitted guard protects the teeth; supplements play only a supporting role.

    Overview

    Bruxism is repetitive clenching or grinding of the teeth, either during sleep or while awake. Sleep bruxism is now understood mainly as a sleep arousal phenomenon rather than a bite problem, and it clusters with stress, anxiety, sleep apnea, reflux, smoking, alcohol, caffeine, and certain medications - SSRIs and stimulants in particular. Awake bruxism is more often a stress-related clenching habit. The consequences are what drive treatment: worn or cracked teeth, jaw muscle ache, morning headaches at the temples, and temporomandibular joint pain. A dentist-fitted occlusal splint does not stop the grinding but protects the teeth from it, and remains the mainstay. Behavioural approaches - stress management, daytime clenching awareness, reducing evening alcohol and caffeine - help a proportion of people, and treating coexisting sleep apnea or reflux can reduce episodes substantially. Botulinum toxin into the masseter muscles reduces muscle force in trials and is used selectively for severe cases. Supplement evidence is limited: magnesium is often suggested and may help muscle discomfort where intake is low, and there is no trial evidence that any supplement reduces grinding episodes.

    How It's Diagnosed

    When to See a Doctor

    See a dentist for worn, chipped or sensitive teeth, and a clinician if grinding comes with loud snoring or daytime sleepiness, or if it started after beginning a new medication.

    Supplements Studied For This

    Magnesium

    Mineral
    Mixed evidence
    Effectiveness 2/5

    Magnesium is sometimes suggested for bruxism because of its role in muscle relaxation and sleep quality, but direct trial evidence for teeth grinding is thin. A fitted mouthguard and stress/sleep management remain the primary interventions.

    Supporting Research

    Pharmacotherapy for sleep bruxism

    2014Cochrane Database of Systematic Reviews
    systematic_review

    Occlusal splints for treating sleep bruxism (tooth grinding)

    2007Cochrane Database of Systematic Reviews
    systematic_review

    Efficacy of botulinum toxin type A in the targeted treatment of sleep bruxism: a double-blind, randomised, placebo-controlled, cross-over study

    2022BMJ Neurology Openn=22
    crossover

    Botulinum Toxin Therapy for Managing Sleep Bruxism: A Randomized and Placebo-Controlled Trial

    2020Toxinsn=30
    rct

    Self-reported sleep bruxism is associated with vitamin D deficiency and low dietary calcium intake: a case-control study

    2021BMC Oral Healthn=100
    observational

    Frequently Asked Questions

    Does a mouthguard stop grinding?
    No, it protects the teeth from the force rather than stopping the behaviour. A dentist-fitted splint is preferred over shop-bought versions, which fit poorly and can shift the bite.
    Does magnesium help?
    There is no trial evidence that magnesium reduces grinding. It may ease muscle discomfort where intake is low, and doses above roughly 350 mg/day of supplemental magnesium commonly cause loose stools.
    Can medications cause it?
    Yes. SSRIs, SNRIs and stimulants are recognised triggers. If grinding started within weeks of a new prescription, that is worth raising with the prescriber rather than stopping on your own.
    Is sleep apnea related?
    Often. Grinding episodes frequently follow arousals from breathing events, so treating apnea can reduce bruxism considerably. Loud snoring with daytime sleepiness is worth investigating.
    Do alcohol and caffeine matter?
    Both are associated with more frequent episodes, alcohol particularly in the second half of the night. Reducing evening intake is a reasonable, low-cost first step.
    What about botulinum toxin?
    Injections into the masseter muscles reduce bite force and pain in trials for severe bruxism. Effects wear off over 3-4 months and it is a specialist decision.

    My Notes

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    This information is for educational purposes only. Always consult a healthcare professional before starting any supplement regimen.