HomeSensorySmell loss linked to 100-plus diseases

Smell loss linked to 100-plus diseases

Smell loss, the nose knows: Research shows that scent therapy may reduce inflammation and boost health

Researchers from the Charlie Dunlop School of Biological Sciences, in collaboration with The Oxford Research Centre in the Humanities, reveal a powerful link between olfactory loss (smell loss) and inflammation in a staggering 139 medical conditions. This research — led by professor emeritus Michael Leon, and researchers Cynthia Woo and Emily Troscianko — emphasizes a little-known but potentially life-altering connection: the role our sense of smell plays in maintaining our physical and mental health.

The study appears in Frontiers in Molecular Neuroscience.

Olfactory dysfunction, often dismissed as a minor inconvenience, may actually be an early sign of various neurological and bodily diseases, as indicated by this research. “The data are particularly interesting because we had previously found that olfactory enrichment can improve the memory of older adults by 226 percent,” said Leon. “We now know that pleasant scents can decrease inflammation, potentially pointing to the mechanism by which such scents can improve brain health.”

This finding, he added, could hold key implications for mitigating symptoms and possibly even reducing the onset of certain diseases through therapeutic olfactory stimulation.

The study delves into the methodical tracking of 139 medical conditions associated with both olfactory loss and heightened inflammation, uncovering insights into a shared pathway linking these factors. Olfactory loss, which often precedes conditions such as Alzheimer’s and Parkinson’s diseases, may serve as an early indicator of disease onset, allowing for more proactive therapeutic approaches.

“It was difficult to track down the studies for so many medical conditions,” said Leon, reflecting on the complexity of linking olfactory loss to such a wide array of disorders. The challenge, he added, underscores the importance of these findings in framing olfactory health as integral to overall well-being.

By showing how olfactory enrichment can mitigate inflammation, this research has laid a foundation for future studies aiming to explore the therapeutic use of scent to address a broader range of medical conditions. “It will be interesting to see if we can ameliorate the symptoms of other medical conditions with olfactory enrichment,” said Leon.

Together with Woo, Leon is now working on a device to deliver olfactory therapy, which could hold promise as a novel, non-invasive way to improve health outcomes.

As science continues to uncover the profound impacts of our senses on health, this research underscores a critical need for further study into olfactory therapies.

More information on smell loss

Loss of smell, also known as anosmia, can be a partial or complete inability to smell which can be temporary or permanent occurring due to a number of possible reasons such as:

  • Colds and sinus infections: Mucus membranes in the nose can become irritated or obstructed, making it difficult to smell. Decongestants, antihistamines, vaporizers, and humidifiers can help. 
  • Aging: Some loss of smell is a normal part of aging. 
  • Other health conditions: Loss of smell can be a symptom of other health issues, such as Alzheimer’s disease, diabetes, Parkinson’s disease, or brain injuries. 
  • Medications: Some antibiotics, nasal sprays, and other drugs can impact your sense of smell. 
  • Vitamin deficiencies: A lack of vitamins A, B6, B12, and zinc can cause loss of smell. 
  • Exposure to chemicals: Exposure to industrial chemicals, heavy metals, acids, and pollutants can damage the nerves in the brain that process smell. 
  • Trauma: Blows to the head or injuries to the nose can impact your sense of smell. 

It is important to note that the loss of smell can also be a sign of a nervous system condition, and you should see a doctor if it’s not related to a cold or sinus infection, or if your sense of smell doesn’t return after congestion clears.


As with anything you read on the internet, this article should not be construed as medical advice; please talk to your doctor or primary care provider before changing your wellness routine. WHN does not agree or disagree with any of the materials posted. This article is not intended to provide a medical diagnosis, recommendation, treatment, or endorsement. Additionally, it is not intended to malign any religion, ethnic group, club, organization, company, individual, or anyone or anything. These statements have not been evaluated by the Food and Drug Administration. 

Content may be edited for style and length.

References/Sources/Materials provided by:

This article was written by Ethan Perez at the University of California-Irvine

https://news.uci.edu/2024/10/29/smell-loss-linked-to-100-plus-diseases-in-new-uc-irvine-study/

https://uci.edu

http://dx.doi.org/10.3389/fnmol.2024.1455418

https://www.yalemedicine.org/conditions/smell-and-taste-disorders#:~:text=Anosmia%20is%20the%20partial%20or,no%20cure%20for%20congenital%20anosmia.

https://www.mayoclinic.org/symptoms/loss-of-smell/basics/causes/sym-20050804

Posted by the WHN News Desk
Posted by the WHN News Deskhttps://www.worldhealth.net/
WorldHealth.net The original website of the A4M. Non-Profit trusted source of non-commercial health information, and the original voice of the American Academy of Anti-Aging (A4M). To keep receiving the free newsletter opt in.