Vitamin D supplementation improved symptoms of autism in a recent trial. Studies have shown an association between the risk of autism spectrum disorder and vitamin D insufficiency. In this latest study, 109 children with autism spectrum disorder were randomized to receive four months of vitamin D3 supplementation or a placebo. “Autism symptoms–such as hyperactivity, social withdrawal, and others–improved significantly following vitamin D3 supplementation but not after receiving placebo,” said Dr. Khaled Saad, lead author of…

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