October 21, 2018

New study demonstrates efficacy of vitamin D supplementation with autism spectrum disorder

Approximately 2% of American children experience symptoms among the autism spectrum including deficits in social interaction, impairment in verbal and nonverbal communication, and stereotyped patterns of activities. Many families seek integrative doctors to investigate food sensitivities, environmental toxins, nutritional deficiencies, and metabolic imbalances not seen on the usual laboratory testing.

According to a study published 2 weeks ago in The Journal of Child Psychology and Psychiatry, researchers demonstrated the efficacy of vitamin D supplementation in autism spectrum disorder (ASD). Vitamin D has an essential role in neurodevelopment, gene regulation, immune function, inflammation, and overall health. Previous studies have shown a link between the risk of ASD and vitamin D insufficiency. In addition, vitamin D deficiency during pregnancy is linked with adverse effects in the fetus and an increased risk of autism.

This study was a 4-month, double-blinded, randomized, placebo-controlled trial including 109 children with ASD from outpatient clinics and five private autism treatment centers. Serum vitamin D levels were measured at the beginning and at the end of the study.

Vitamin D supplementation was dosed at 300 IU per kg/day and not to exceed 5,000 IU/day. The autistic symptoms of the children improved significantly following 4-months vitamin D supplementation, which was not seen in the placebo group. There was a significant improvement in irritability, hyperactivity, social withdrawal, stereotypic behavior, and inappropriate speech as well as significantly fewer autistic mannerisms such as, repetitive hand movements, creation of noises, and jumping.

This is the first double-blinded RCT demonstrating the efficacy of vitamin D supplementation in children with ASD. Nutrition is incredibly important and can be difficult to accomplish for children with Autism Spectrum Disorders. It can be difficult for some parents to get their kids to eat a nutrient dense diet. Children are growing, the brain is developing and there tends to be some nutritional gaps due to lack of variety in their diet, soil deficiencies, or eating processed, convenience foods. Children may be influenced by advertising or packaging and sometimes pick products to eat. A well balanced diet consisting of whole foods should be the number one priority and foundation of their health but supplements can definitely fill in some of the gaps to support optimal health.

The level of nutrient intake that maintains the best possible health is highly variable from person to person. Lifestyle choices and environmental exposures filtered through genetic predisposition are fundamental factors in ASD, and a successful treatment approach must include investigation into these factors. It is important to assess the nutrient status of the child. This can be the antioxidant status, vitamins, essential fatty acids, vitamin D, B12, folate, calcium, etc. An organic acid test is also a great test to assess nutrient deficiencies, oxidative stress, and detoxification impairment as well as stool testing to assess the gut microbiome.

Source: Saad, K. et al. Randomized controlled trial of vitamin D supplementation in children with autism spectrum disorder. Journal of Child Psychology and Psychiatry, 2016.

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