Low serum tryptophan to large neutral amino acids ratio in idiopathic infantile autism.

Abstract

The serum tryptophan to large neutral amino acids ratio (Try/LNAA) is considered a reliable marker of tryptophan availability for brain serotonin synthesis. A dysfunction of brain serotonergic activity has been postulated to exist in autistic disorder and supported by recent studies. On this basis, we determined the serum amino acids levels in 40 children… (More)

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