Table 1 Plasma Concentrations of Phenylalanine and Tyrosine Before and 5 h After Ingesting the AA Mixture

From: Decreasing Amphetamine-Induced Dopamine Release by Acute Phenylalanine/Tyrosine Depletion: A PET/[11C]Raclopride Study in Healthy Men

Amino acid Morning baseline Postmixture
Phenylalanine (μmol/l) balanced 43.8±1.4 75.4±23.6**
Phenylalanine (μmol/l) APTD 45.8±3.6 10.5±4.8**
Tyrosine (μmol/l) balanced 55.4±8.0 131.7±45.2**
Tyrosine (μmol/l) APTD 54.1±8.6 15.3±5.3*
  1. Planned comparisons, *p<0.05, ** p0.01.