Low vitamin D, virus, vaccination, microplastics, Tylenol, gut bacteria, anti-biotics, Folic Acid,
transgender, extreme preterm birth, toxins, heavy metals, - - Most of which are fought by Vitamin D
transgender, extreme preterm birth, toxins, heavy metals, - - Most of which are fought by Vitamin D
Related in VitaminDWiki
Increased by: Vaccines, Virus, Toxins, Microplastics
- Vaccines increase the risk of autism (25 studies) - Feb 2025
- Does a vaccine increase the risk of Autism – March 2019
- Autism and ADHD type disorders were 14X more likely in survey of extreme preterm vaccinated infants - April 2017
- Aluminum increases Autism etc., silica decreases Aluminum - Dr. Coimbra video March 2025
- Autism risk if toxins, heavy metals, microplastics, etc during pregnancy (unless add Vitamin D) – Feb 2024
- Multiple Childhood Vaccinations increased autism risk by 4.4 X (Florida) – Jan 2025
Increased by: mother's obesity
Increased by: Gut bacteria, Tylenol, Folic Acid, Antibiotics, Transgender
- Aspartame while pregnant increased risk by 3.4 X that male infant will be Autistic – Sept 2023
- Autism is strongly associated with 31 gut microbiota (bacteria, archaea, fungi, and viruses) – July 2024
- Autism risk increased if infant had antibiotics (2X), acetaminophen (3X), or no vitamin D drops (1.5X) – June 2018
- Tylenol associated with both low vitamin D and Autism
- Quote from the internet: "A major problem with this theory is that in 1982, because of the cyanide poisoning scare, tylenol usage plummeted from 35% to only 8% and didn't recover to its previous high until about 2005. If Tylenol was a contributor to autism then we would've seen a drop in autism. But we didn't."
- Transgender associated with autism, low vitamin D, low BMD, etc. - many studies
Increased / Decreased by some vitamins
- Autism severity is associated with each of low Vitamins D, A, B-12 and E – Sept 2024
- Autism treated by Vitamin B12 - several studies
- Autism 17 times more likely with excessive Folic Acid and B-12 (now added to bread) – May 2016
Decreased by: Vitamin D, etc.
- Autistic measure 5X more likely if low vitamin D in second trimester – Oct 2012
- Autism risk is reduced by Vitamin D – early pregnancy or chlldhood – Umbrella review – July 2024
- Vitamin D fights autism - trying to figure out how and why – May 2022
- Autism virtually non-existent if vitamin D levels greater than 44 ng while pregnant - Dec 2023
- Autism associated with low Vitamin D (again) – Meta-Analysis Jan 2021
- Autism severity is associated with each of low Vitamins D, A, B-12 and E – Sept 2024
- 24% lower risk of Autism for every 4 ng higher level of vitamin D during pregnancy – Feb 2024
- Autism treated by Vitamin D (80 – 120 ng) – Cannell update May 2018 much more than the 30 ng required by bones
- Autism may be worse if low in both Vitamin D and Vitamin A – Jan 2018
- Autistic symptoms reduced by Vitamin D and or Omega-3 – RCT March 2019
- Autism decreased in 8 out of 10 children supplemented with vitamin D – April 2015
- Autism risk factors – many are associated with low vitamin D – meta-meta-analysis March 2017
- Vitamin D and autism - treat: 300 IU per kg per day, prevent: during pregnancy 5,000 IU – Feb 2017
- Autism 2X to 3X more likely if poor Vitamin D Receptor – June 2020
- Autism treated by an activator of the Vitamin D Receptor: supforaphane - March 2024
- Autism 1.75X more likely if BOTH maternal and infant vitamin D levels were low – Nov 2019
- Autism risk increased 30 percent by Cesareans (both low vitamin D) – meta-analysis Sept 2019
- Most Autism Risk factors are associated with low vitamin D - March 2014
- 25 reasons to associate Autism with low vitamin D - Dr. Cannell 2013
- Both have strong inheritance features – Vitamin D about 60%
- Both have gotten substantially worse in last 30 years
- Vitamin D is known to be involved in brain development
- All autistic children are VitD deficient, but not all children who are deficient are autistic: genes are involved
- When giving vitamin D to cure children of rickets “mental dullness” decreases as well
- Children with genes which give them too much (Williams Syndrome) have to reverse of autism – too sociable
- Mothers having lots of fish (and thus more vitamin D) give birth to kids with less autistic symptoms
- Both associated with weak bones
- Both worse around the age of weaning
- Autism is more common in rich families – more likely to apply sun screen and stay indoors
- Autism increases with drugs which lower levels of vitamin D
- Seizures are common with Autism - Vitamin D has been shown to reduce seizures
- Fewer autistic symptoms (such as sleep problems) during summer: when child gets more vitamin D from the sun
- Both worse with latitude
- Both vary with Ultraviolet light
- Both vary with time of year (more birth of autistics in March in Northern hemisphere)
- 2X more urban autism – less UVB in urban environments
- Both worse with pollution
- Both worse with increased clouds and rain
- Both worse with closely spaced pregnancies
- Autistics have abnormal immune response – similar to that of vitamin D deficiency
- Low levels of vitamin D in mother animals reduces brain function in offspring
- Vitamin D deficient rat pups have similar brain abnormalities to that of human autistic children
- Autistic children get less vitamin D in their blood for the same amount of sun exposure
- The 4 males/1 female ratio - Note estrogen increases vitamin D in the brain (testosterone does not)
- Both worse in African Americans (A-A 2-3 increased autism rate)
- Both worse in Dark-skinned immigrants in Europe
"Probably" no affect
Prenatal ultrasound
Risk factors for Autism - hundreds of studies, and Dr. Roger's 2021 Dissertation on the factors - July 2025
Mapping autism causation studies, Part II July 2025
Dissertation PDF
Tylenol and Autism - the appeals continue - Perplexity AI July 2025
Perplexity PDF. No evidence - July 2023
Top 10 Risk factors by Perplexity AI - adds 5 more factors
| RISK | EVIDENCE | |
| 1. Genetic Factors/Heritability | PROVEN | |
| 2. Advanced Paternal Age | PROVEN | 600% if over 45 years old |
| 3. Advanced Maternal Age | PROVEN | 18% for every 10 years |
| 4. Low Birth Weight/Prematurity | PROVEN | 400% |
| 5. Gestational Diabetes/Maternal Diabetes | STRONG | ~50% |
| 6. Prenatal Valproate Exposure | STRONG | 520% |
| 7. Air Pollution Exposure During Pregnancy | STRONG | 46% per 10 micrograms PM2.5 |
| 8. Severe Maternal Infections During Pregnancy | MODERATE | 60% |
| 9. Prenatal Pesticide Exposure (Organophosphates) | MODERATE | 330% |
| 10. Cesarean Section Delivery | SUSPECTED | 33% |
URL = is.gd/autismfactors