Tryptophan and Glycine: study protocols
3 study groups took Tryptophan together with Glycine. 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
1 of 3 study groups took Tryptophan and Glycine with something else, but nothing that 3 or more different studies gave.
3 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 | 2.25 g | 1 day | 15 |
| Combined Supplementation with Glycine and Tryptophan Reduces Purine-Induced Serum Uric Acid Elevation by Accelerating Urinary Uric Acid Excretion: A Randomized, Single-Blind, Placebo-Controlled, Crossover Study 2019 · Glycine + tryptophan group · Healthy Japanese males aged 20–64 with lower urinary uric acid excretion | 400 mg | 6 g | 1 day | 16 |
| Serum Uric Acid-Lowering Effects of Combined Glycine and Tryptophan Treatments in Subjects with Mild Hyperuricemia: A Randomized, Double-Blind, Placebo-Controlled, Crossover Study 2019 · Active amino acid mixture · Japanese adults aged 21–62 with mild hyperuricemia (serum uric acid 6.6–7.9 mg/dL); 30 men and 1 woman completed the study | 200 mg | 3 g | 6 weeks | 31 |