Loss of smell may be related to low Zinc or perhaps low vitamin D

A possible correlation between vitamin D deficiency and loss of smell: 2 case reports – 2011
2 people reported increased ability to smell after increasing vitamin D levels
With 10,000 IU of vitamin D daily her ability to smell started to return after a few months
 Download the PDF from VitaminDWiki

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VitaminDWiki Observations

• Loss of taste and smell sensitivity after chemotherapy, which is associated with low Vitamin D
• Loss of smell associated with obesity – which is associated with low Vitamin D
• Loss of smell is an early indication of both Parkinson’s and Alzheimer’s diseases, which are associated with low Vitamin D
• Loss of smell and taste is associated with Multiple Sclerosis, which is associated with low Vitamin D

See also VitaminDWiki

• 96 percent of ear, nose, throat children had less than 30 ng of vitamin D – Jan 2013
• Nasal polyposis greatly decreased by 4,000 IU of vitamin D for 4 weeks - 2014
• Off topic: Women can learn a smell 100,000 X better then men – Aug 2017

See also web

• Serum 25-hydroxyvitamin D3 level may be associated with olfactory dysfunction in de novo Parkinson's disease Aug 2018
  doi: 10.1016/j.jocn.2018.08.003.
• Olfaction: Smell of Change in the Air Aug 2017
  
  Note: Women can smell better than men
• Serum 25-hydroxyvitamin D3 level may be associated with olfactory dysfunction in de novo Parkinson's disease Nov 2018

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See also: smell and Zinc on the web

Zinc and Taste Disturbances in Older Adults: A Review of the Literature.
Consult Pharm. 2016 May;31(5):267-70. doi: 10.4140/TCP.n.2016.267

• According to the National Health and Nutrition Examination Survey III, 35% to 45% of adults 60 years of age or older had zinc intakes below the estimated average requirement of 6.8 mg/day for elderly females and 9.4 mg/day for elderly males. Zinc deficiency may lead to
  loss of appetite,
  impaired immune function,
  weight loss,
  delayed healing of wounds,
  eye and skin lesions, and
  smell and taste disturbances.
• Older adults are especially affected by changes in taste sensations because of age-related gustatory dysfunction, use of multiple medications, increased frailty, and zinc deficiency. This article reviews the finding of clinical studies investigating the use of zinc supplementation for improvement with taste disturbances in older adults.
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• Common Signs of Nutrient Deficiency 2014
  Low Zinc is another possible cause (link includes other symptoms of low zinc)
• Why Can't I Smell Anything? --Top 10 Causes and Remedies updated Feb 2017
  “1% to 2% percent of people in North America report a “smell Disorder”:
  “anosmia,” = the inability to detect odors,
  “hyposmia,” -decreased ability to detect odors
  • Note: Zinc deficiency increases with age
• Natural Cures for Loss of Smell lots of user discussion
  Castor Oil, Garlic, Zinc, Omega-3, Alpha Lipoic Acid , Borax, .
• Infants and elderlies are susceptible to zinc deficiency Feb 2016
  Zinc meaasured in hair from 20,000 Japanese, Full PDF online
  

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