Vitamin B9 and Autism Ranking: Insufficient/Mixed evidence


vitamin B9Vitamin B9 (also known as folacin, folate or folic acid) is a vitamin found in small amounts in many foods including broccoli, Brussels sprouts and peas.

It can also be taken as a nutritional supplement, either on its own or as part of a multivitamin.

Vitamin B9 helps produce and maintain new cells, helps maintain normal levels of some amino acids such as homocysteine and glutathione, and helps maintain normal levels of some neurotransmitters such as dopamine.

Some people believe that individuals with autism have significant metabolic abnormalities.

They also believe that some of those metabolic abnormalities can be addressed by consuming more foodstuffs containing vitamin B9 or by taking supplements of vitamin B9 (sometimes alongside supplements of other vitamins and minerals).

Our Opinion

We are currently reviewing the research evidence for the use of vitamin B9 for people with autism.

If you are aware of further research, or you would like to share your personal experiences of using vitamin B6 please email info@researchautism.net Thank you.


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28 Oct 2016
Last Review
01 Jul 2014
Next Review
01 Jul 2017