Vitamin B-9 (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).
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This glossary is designed to explain some of the jargon and gobbledygook used by some people when they talk about autism or research..
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The fact that an intervention is listed in this glossary does not necessarily mean that we agree with its use. Nor does it necessarily mean that there is any scientifically valid or reliable evidence behind it.