The serotonin transporter gene-linked polymorphic region (5-HTTLPR) and the sleep-promoting effects of tryptophan: A randomized placebo-controlled crossover study
Study link
https://pubmed.ncbi.nlm.nih.gov/31237183/
Health Goal
Sleep, Sleep Latency, Sleep Duration
Dietary Supplement
L-Tryptophan
Study Level
Randomized, Controlled Clinical Trial