Low concentrations of serum tyrosine in neuroleptic-free schizophrenics with an early onset

J Wei, H Xu, C N Ramchand, G P Hemmings

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The concentrations of serum tyrosine, phenylalanine and tryptophan have been determined in 23 male neuroleptic-free patients with schizophrenia and 28 male healthy control subjects. Tyrosine was significantly lower in neuroleptic-free patients with an early onset (starting before adulthood) than in healthy control subjects (p
Original languageEnglish
Pages (from-to)257-60
Number of pages4
JournalSchizophrenia Research
Issue number3
Publication statusPublished - Feb 1995



  • Adult
  • Age of Onset
  • Brain
  • Chromatography, High Pressure Liquid
  • Homovanillic Acid
  • Humans
  • Male
  • Middle Aged
  • Phenylalanine
  • Schizophrenia
  • Tryptophan
  • Tyrosine

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