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Autism is the least in regions having the most sunshine (and vitamin D) – Nov 2017

A review of prevalence studies of Autism Spectrum Disorder by latitude and solar irradiance impact.

Med Hypotheses. 2017 Nov;109:19-24. doi: 10.1016/j.mehy.2017.09.012. Epub 2017 Sep 19.
Syed S1, Moore KA2, March E1.
1 School of Health Sciences & Psychology, Federation University Australia, Churchill 3842, Australia.
2 School of Health Sciences & Psychology, Federation University Australia, Churchill 3842, Australia;
   School of Psychology, Charles Sturt University, Bathurst 2795, Aust.. k.moore at federation.edu.au.

VitaminDWiki

Autism treated by Vitamin D: Dr. Cannell - video June 2013 includes many reasons why he believes Autism is related to Vitamin D

  1. Both have strong inheritance features – Vitamin D about 60%
  2. Both have gotten substantially worse in last 30 years
  3. Vitamin D is known to be involved in brain development
  4. All autistic children are VitD deficient, but not all children who are deficient are autistic: genes are involved
  5. When giving vitamin D to cure children of rickets “mental dullness” decreases as well
  6. Children with genes which give them too much (Williams Syndrome) have to reverse of autism – too sociable
  7. Mothers having lots of fish (and thus more vitamin D) give birth to kids with less autistic symptoms
  8. Both associated with weak bones
  9. Both worse around the age of weaning
  10. Autism is more common in rich families – more likely to apply sun screen and stay indoors
  11. Autism increases with drugs which lower levels of vitamin D
  12. Seizures are common with Autism - Vitamin D has been shown to reduce seizures
  13. Fewer autistic symptoms (such as sleep problems) during summer: when child gets more vitamin D from the sun
  14. Both worse with latitude
  15. Both vary with Ultraviolet light
  16. Both vary with time of year (more birth of autistics in March in Northern hemisphere)
  17. 2X more urban autism – less UVB in urban environments
  18. Both worse with pollution
  19. Both worse with increased clouds and rain
  20. Both worse with closely spaced pregnancies
  21. Autistics have abnormal immune response – similar to that of vitamin D deficiency
  22. Low levels of vitamin D in mother animals reduces brain function in offspring
  23. Vitamin deficient rat pups have similar brain abnormalities to that of human autistic children
  24. Autistic children get less vitamin D in their blood for the same amount of sun exposure
  25. The 4 males/1 female ratio - Note estrogen increases vitamin D in the brain (testosterone does not)
  26. Both worse in African Americans (A-A 2-3 increased autism rate)
  27. Both worse in Dark-skinned immigrants in Europe



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Autism Spectrum Disorder (ASD) is a lifelong disability with no known cause or cure. Among the suggested etiologies, is Cannell's hypothesis of a deficiency in Vitamin D the main natural source of which is Solar Ultraviolet-B (UVB) radiation. The aim in this paper is to build on this hypothesis and explore the relationship of solar irradiance of which UVB is a component, by latitude with the prevalence rates of ASD. Twenty-five reports published between 2011 and 2016 using comparable diagnostic criteria were reviewed. The results suggest a tendency for the prevalence rates of ASD to be lowest in countries near the equator and for this rate to increase as the latitude increases. These findings provide some support not just for the Vitamin D hypothesis, but also for a new proposition that along with UVB radiation, the entire solar radiation spectrum which reaches the earth, may play a role in ASD. While these results are both novel and encouraging in terms of the potential efficacy of exposure to natural sunlight, further research is warranted before results can be considered definitive, and before the implications of the findings can be implemented clinically.

Copyright © 2017 Elsevier Ltd. All rights reserved.

PMID: 29150285 DOI: 10.1016/j.mehy.2017.09.012

 Download the PDF from SciHub via VitaminDWiki

Created by admin. Last Modification: Wednesday November 22, 2017 01:56:11 UTC by admin. (Version 4)

Attached files

ID Name Comment Uploaded Size Downloads
8790 Autism prevalence.jpg admin 20 Nov, 2017 17:36 36.06 Kb 25
8789 Autism map.jpg admin 20 Nov, 2017 17:36 55.59 Kb 29
8788 Hypothesis autism.pdf PDF 2017 admin 20 Nov, 2017 17:33 415.46 Kb 13
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