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Hearing management

Updated 14 December 2017

How magnesium may help prevent tinnitus

When nerve cells in the inner ear die the auditory cortex in the brain keeps on relaying sound to the brain, resulting in tinnitus, even when there’s no signal from the ear.

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Tinnitus is commonly described as a ringing in the ears that only the affected person can hear.

In other words, it is the perception of sound when there is no actual external noise. The perceived sound, apart from ringing, can include clicking, whistling, hissing and buzzing.

Tinnitus commonly affects people over 65. It can be a temporary (acute) or chronic (ongoing) problem, and in the UK, persistent tinnitus affects an estimated 10% of the population. 

Causes of tinnitus

According to the American Tinnitus Association there are around 200 different health disorders that can cause tinnitus.

Prior damage to the auditory system like age-related or noise-induced hearing loss may be a cause of tinnitus.

It is still uncertain in what way hearing loss is associated with tinnitus, but it may be the way the brain fills in the missing sound frequencies it is no longer receiving from the auditory system.

Read: Symptoms of hearing loss

Blockages in the ear canal can affect the ear drum and when anything touches the ear drum it can cause tinnitus.

Things like dirt or foreign objects, head congestion, or excessive ear wax can obstruct the ear canal. The removal of the foreign object will in most cases clear up the tinnitus symptoms. 

Other possible causes of tinnitus include:

  • Head and neck trauma
  • Sinus pressure
  • Brian injury
  • Prescription medication
  • Thyroid problems
  • Blood vessel disorders
  • Psychiatric disorders

The role of glutamate

According to Nutrition Review, loud noise or infections causes the hair cells in the ears to secrete excessive amounts of a neurotransmitter called glutamate.

This is called a “glutamate storm” and the resultant over-stimulation of the nerve cells in the inner ear can cause them to die.

Read: Inner-ear disorders may cause hyperactivity

The nerve cells transmit impulses to the auditory cortex in the brain, and when they die the auditory cortex keeps on relaying sound to the brain, resulting in tinnitus, even when there’s no signal from the ear.    

Enter magnesium

It has been demonstrated that too much of the amino acid glutamate may lead to tinnitus, and that glutamate antagonists can protect the inner ear. Magnesium protects the nerves in the inner ear and is a strong inhibitor of glutamate.

Tinnitus is caused by the “unregulated production of glutamate at sound frequencies for which there is no external stimulation”.  

Read: Which foods have magnesium?

It was found that after exposure to very high noise volume there is a significant drop in the level of magnesium in the inner ear fluid. A study showed that subjects who took oral magnesium demonstrated much less noise-induced hearing loss in comparison to a control group.

In addition, a 2002 animal trial showed that "in the guinea pig preventive dietary magnesium supplement can protect the inner ear against noise-induced impairment of blood flow and oxygenation, which may partly be responsible for noise-induced hearing loss".

Read more:

Tinnitus: why the ringing in your ears may be hard to treat

Tinnitus rife in teens

Magnetic therapy won't relieve ringing in ears

References:

Nutrition review:Silencing Tinnitus – New Research Seeks to Reduce Ringing in Ears. http://nutritionreview.org/2014/07/silencing-tinnitus-new-research-seeks-to-reduce-ringing-in-ears/

Center for Hearing Loss Help: Tinnitus and Magnesium Deficiency. http://hearinglosshelp.com/blog/tinnitus-and-magnesium-deficiency/

Arches Natural Products:Magnesium, Your Health & Tinnitus. https://www.tinnitusformula.com/library/magnesium-your-health-tinnitus/#.VLkCpy4enLU

NHS CHoices: Tinnitus. http://www.nhs.uk/conditions/tinnitus/Pages/Introduction.aspx

American Tinnitus Association: Causes. https://www.ata.org/understanding-facts/causes

Pubmed: Preventive magnesium supplement protects the inner ear against noise-induced impairment of blood flow and oxygenation in the guinea pig (2001). http://www.ncbi.nlm.nih.gov/pubmed/12030419

 

Ask the Expert

Hearing Expert

Dr Kara Hoffman graduated from UCT in 2004, thereafter she completed her year of community service in Durban. In 2010 she completed her Masters Degree in Paediatric Aural Rehabilitation from UKZN. In 2016, she became a Doctor of Audiology through the University of Arizona (ATSU). Dr Hoffman and her partner Lauren Thompson opened a fully diagnostic audiology practice called Thompson & Hoffman Audiology Inc. In 2011 with world-class technology and equipment to be able to offer the broad public all hearing-related services including hearing testing for adults and babies, vestibular (balance) assessments and rehabilitation, industrial audiology, hearing devices, central auditory processing assessments for school-aged children, school screening, neonatal hearing screening programmes at Alberlito and Parklands Hospital, cochlear implants and other implantable devices, medicolegal assessments and advanced electroacoustic assessments of hearing. Thompson and Hoffman Audiology Inc. are based at Alberlito Hospital in Ballito, St Augustines Hospital in Durban and at 345 Essenwood Road, Musgrave. The practices are all wheelchair friendly. There are three audiologists that practice from Thompson & Hoffman – including Dr Kara Hoffman, Lauren Thompson & Minette Lister. The practice boasts professional, highly qualified, and extensive diagnostic services where all your hearing healthcare needs can be met. The additional licensing in vestibular assessment and rehabilitation, paediatric rehabilitation and cochlear implantation places this practice in one of the top specialist audiological positions in South Africa, with a wealth of experience in all clinical areas of audiology and is a very well respected and sought-after practice.

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