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Symptoms of Autism

Research analysis led by Kamal Patel.
All content reviewed by the Examine.com Team. Published: Jun 28, 2017
Last Updated:

Summary of Symptoms of Autism

Primary Information, Benefits, Effects, and Important Facts

Scientific Information on Symptoms of Autism

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Human Effect Matrix

The Human Effect Matrix looks at human studies (it excludes animal and in vitro studies) to tell you what supplements affect symptoms of autism
Grade Level of Evidence
Robust research conducted with repeated double-blind clinical trials
Multiple studies where at least two are double-blind and placebo controlled
Single double-blind study or multiple cohort studies
Uncontrolled or observational studies only
Level of Evidence
? The amount of high quality evidence. The more evidence, the more we can trust the results.
Outcome Magnitude of effect
? The direction and size of the supplement's impact on each outcome. Some supplements can have an increasing effect, others have a decreasing effect, and others have no effect.
Consistency of research results
? Scientific research does not always agree. HIGH or VERY HIGH means that most of the scientific research agrees.
Notes
grade-b - - See all 3 studies
grade-c Notable - See study
High dose carnitine (50mg per kilogram) appears to reduce some symptoms of autism as assessed by rating scales; notable due to the rarity of a supplement towards this goal
grade-c - Very High See 2 studies
The better conducted trial and parts of the preliminary evidence suggest no therapeutic benefit of ginkgo biloba in the treatment of autism

All comparative evidence is now gathered in our ​A-to-Z Supplement Reference.

The evidence for each separate supplement is still freely available ​here.

grade-d