Trial of Vitamin D3 Supplementation in Paediatric Autism

Vitamin D3 for Autism Spectrum Disorder: a Randomized, Double-blind, Placebo-controlled Trial.

To build on a recent case study and open label trial, the investigators want to find out if vitamin D supplementation can influence behavioural and core symptoms of autism.

The investigators will assess behavioural and core symptoms of autism before and after 20 weeks of vitamin D supplementation in a double-blind, placebo-controlled trial.

Inclusion Criteria:

• Positive autism diagnostic observation schedule
• Stable medication regimen
• Tolerate phlebotomy

Exclusion Criteria:

• Unstable or very severe autism
• Epilepsy
• Renal/liver/gastrointestinal disease