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Catalyst

L-tyrosineFinding

L-tyrosine increases blood tyrosine concentration

raisesVery limited evidenceFindingreplicated ×1

01 · The sentence it was drawn from

“Dietary supplements of tyrosine increased plasma tyrosine concentrations; however, no change in test performance was found across the tyrosine and placebo phases of the study.”
Quoted verbatim from Randomised controlled trial of tyrosine supplementation on neuropsychological performance in phenylketonuria.
This finding among the 4 findings on its endpoint

L-tyrosine

Blood tyrosine concentration

raises

Who
Individuals with phenylketonuria aged 6 to 28 years on dietary treatment, L-tyrosine versus L-alanine placebo as an adjunct to diet
Dose studied
L-tyrosine 100 mg/kg body weight/d, four-week phase

Very limited evidencePMID 9579151 · 1998

02 · The study

Study
crossover
Duration
4 weeks

Evidence, by strength

  • strong
  • moderate
  • limited
  • very limitedthis finding
  • insufficient

03 · The paper

Archives of disease in childhood
What else it reported1 finding · 1 compound · 1 endpoint

04 · To cite this finding

This address does not change

https://catalystproject.ai/e/01M6ZVSGCWSKVMFX6VZQRF73PS