"RESULTS: . . . The autism symptoms of the children improved significantly, following 4-month vitamin D3 supplementation, but not in the placebo group. This study demonstrates the efficacy and tolerability of high doses of vitamin D3 in children with ASD.
CONCLUSIONS:This study is the first double-blinded RCT proving the efficacy of vitamin D3 in ASD patients. . . . vitamin D supplementation may safely improve signs and symptoms of ASD and could be recommended for children with ASD."
"Based on the anti-inflammatory, antioxidant, and DNA repair actions of vitamin D reported in the present study, vitamin D could be used as a supplement in patients with autism to ameliorate the symptoms related to these pathways."