In addition to the current epidemic of vitamin D deficiency, say another epidemic—an epidemic of autism—was upon our children? What if the autism epidemic began at the same time the epidemic of vitamin D deficiency began? What if both epidemics had worsened in unison? What if one theory explained all the unexplained facts about autism? What if both epidemics had the same root cause: sun avoidance? What if both were iatrogenic, that is, medical advice to avoid the sun had caused both epidemics? Be warned, what follows is not light reading—autism is not a light disease.

Does The Vitamin D Theory Best Autism?

The theory that vitamin D deficiency, during pregnancy or childhood, causes autism is just a theory. However, the theory has a plausible mechanism of action, explains all the unexplained facts about autism, subsumes several other theories, implies simple prevention, and is easily disprovable—all components of a useful theory. A genetic lesion (abnormality) in some component of the vitamin D system—a lesion vitamin D’s unique pharmacology could overcome—would explain why monozygotic (identical) twins are highly affected while fraternal twins are not. Varying brain levels of activated vitamin D during later life would explain why some identical twins get severe disease while others are barely affected. Falling vitamin D levels over the last 20 years due to sun-avoidance explain autism’s rapid increase in incidence during that same time. The very different effects estrogen and testosterone have on vitamin D metabolism may explain why boys are much more likely to get it than girls are. Lower vitamin D levels in blacks may explain their higher rates of autism. The vitamin D theory has tenable explanations for all the epidemiological features of autism.

What’s The Risk of Going in The Sun?

The window of opportunity to affect brain development is limited. Time is of the essence if the vitamin D theory of autism is correct. Ask yourself, what is the risk of taking your autistic child outside to play in the sun? What’s the risk of pregnant women sunbathing for a few minutes every day? Children always played in the sun before the epidemic of autism; your pregnant grandmother spent time in the sun as well. Physicians considered that sunshine was healthy before the sun-scare, that is, before autism became an epidemic.

Asperger disorder is a form of pervasive developmental disorder characterized by persistent impairment in social interactions, repetitive behavior patterns, and restricted interests. Unlike autistic disorder, no significant aberrations or delays occur in language development or cognitive development. Asperger disorder is generally evident in children older than 3 years and occurs more often in boys.

Children with this disorder often exhibit a limited capacity for spontaneous social interactions, a failure to develop friendships, and a limited number of intense and highly focused interests. Although some people with Asperger disorder may have certain communication problems, including poor nonverbal communication and pedantic speech, many individuals have good cognitive and verbal skills. Bowler and colleagues have reported that, although people with Asperger disorder have fewer memories, the experiences of remembering are qualitatively similar in people with Asperger disorder compared with healthy control subjects.¹ Physical symptoms may include early childhood motor delays, clumsiness, fine motor difficulty, gait anomalies, and odd movements.

Individuals with Asperger disorder have normal or even superior intelligence and may make great intellectual contributions while demonstrating social insensitivity or even apparent indifference toward loved ones. Published case reports of individuals with Asperger disorder suggest an association with the capacity to accomplish cutting-edge research in computer science, mathematics, and physics. Although the deficits manifested by those with Asperger disorder are often debilitating, many individuals experience positive outcomes, especially those who excel in areas not dependent on social interaction.

Persons with Asperger disorder have exhibited outstanding skills in mathematics, music, and computer sciences. Many are highly creative, and many prominent individuals demonstrate traits suggesting Asperger syndrome. For example, biographers describe Albert Einstein as a person with highly developed mathematical skills who was unaware of social norms and insensitive to the emotional needs of family and friends.

Although normal language and cognitive development differentiate Asperger disorder from other developmental disorders, the severe social impairment associated with this condition overlaps with disorders such as high-functioning autism (HFA).

De Spiegeleer and Appelboom (2007) have pointed out that Asperger syndrome is an autism spectrum disorder. For clinical management purposes, Asperger disorder and HFA may be considered together. Impaired social skills are associated with several other conditions (eg, developmental learning disability of the right hemisphere, nonverbal learning disability, schizoid personality disorder, semantic-pragmatic processing disorder, social-emotional learning disabilities).