Tryptophan and L-Tyrosine: study protocols
4 study groups took Tryptophan together with L-Tyrosine. These are the doses the studies gave. They are not a recommendation.
Fewer than 5 study groups in one unit match, too few to draw the chart.
Commonly used together
4 of 4 study groups took Tryptophan and L-Tyrosine with something else, but nothing that 3 or more different studies gave.
4 study groups
| Study | ||||
|---|---|---|---|---|
| Acute tryptophan depletion attenuates conscious appraisal of social emotional signals in healthy female volunteers 2011 · Control mixture · Healthy female volunteers, aged 19–34; no stated psychiatric condition | 1.92 g | 5.75 g | 1 day | 15 |
| Acute oral administration of a tyrosine and phenylalanine-free amino acid mixture reduces exercise capacity in the heat 2013 · BAL · Healthy, moderately trained men unacclimated to exercise in the heat | 2.5 g | 12.5 g | 1 day | 8 |
| Melatonin and dopamine as biomarkers to optimize treatment in phenylketonuria: effects of tryptophan and tyrosine supplementation 2014 · LNAA + placebo (LNAA phase) · Adults aged 21–51 years with classical phenylketonuria; 2 women and 8 men enrolled | 30.6 mg/kg | 98.4 mg/kg | 3 weeks | 10 |
| Melatonin and dopamine as biomarkers to optimize treatment in phenylketonuria: effects of tryptophan and tyrosine supplementation 2014 · LNAA + Trp/Tyr (LNAA + TT phase) · Adults aged 21–51 years with classical phenylketonuria; 2 women and 8 men enrolled | 69.4 mg/kg | 102 mg/kg | 3 weeks | 10 |